How to find the coordinates of the tangency points on direct common tangent line











up vote
0
down vote

favorite












I have to find the coordinates of the tangent points on 2 semi-circles that the center of one of them has an offset of x and y from the center of the other one, I need to draw a tangent line between them, hence the starting and ending point of this line will not be on the semicircles , but I should continue the semi-circles along their perimeter to these start and endpoints, I need to know how could I calculate the start and end point coordinates.



I need the most general case, in which the radius of two circles are not equal



Circles










share|cite|improve this question
























  • Your question is too vague. You don't even say whether your semi-circles have the same radius or not ...
    – Jean Marie
    Nov 19 at 20:38










  • Have you chcked the image? you can visually say if they have or not ? but I want the most general case and will edit the question. is my question too vague just because of this point ?
    – FabioSpaghetti
    Nov 19 at 20:48










  • I hadn't seen there is an image...
    – Jean Marie
    Nov 19 at 20:51










  • No, your question is too vague because there is no answer possible unless you give the coordinates of the center of the first circle and the radii of the two circles.
    – Jean Marie
    Nov 19 at 20:56










  • The coordinates of the center of the first circle is known and also the radii of both circles !! As far as I see, I have tagged it in analytical geometry, so it should have an analytical answer. clearly every paramter can be counted in if it's required to be one of the known
    – FabioSpaghetti
    Nov 19 at 21:54

















up vote
0
down vote

favorite












I have to find the coordinates of the tangent points on 2 semi-circles that the center of one of them has an offset of x and y from the center of the other one, I need to draw a tangent line between them, hence the starting and ending point of this line will not be on the semicircles , but I should continue the semi-circles along their perimeter to these start and endpoints, I need to know how could I calculate the start and end point coordinates.



I need the most general case, in which the radius of two circles are not equal



Circles










share|cite|improve this question
























  • Your question is too vague. You don't even say whether your semi-circles have the same radius or not ...
    – Jean Marie
    Nov 19 at 20:38










  • Have you chcked the image? you can visually say if they have or not ? but I want the most general case and will edit the question. is my question too vague just because of this point ?
    – FabioSpaghetti
    Nov 19 at 20:48










  • I hadn't seen there is an image...
    – Jean Marie
    Nov 19 at 20:51










  • No, your question is too vague because there is no answer possible unless you give the coordinates of the center of the first circle and the radii of the two circles.
    – Jean Marie
    Nov 19 at 20:56










  • The coordinates of the center of the first circle is known and also the radii of both circles !! As far as I see, I have tagged it in analytical geometry, so it should have an analytical answer. clearly every paramter can be counted in if it's required to be one of the known
    – FabioSpaghetti
    Nov 19 at 21:54















up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have to find the coordinates of the tangent points on 2 semi-circles that the center of one of them has an offset of x and y from the center of the other one, I need to draw a tangent line between them, hence the starting and ending point of this line will not be on the semicircles , but I should continue the semi-circles along their perimeter to these start and endpoints, I need to know how could I calculate the start and end point coordinates.



I need the most general case, in which the radius of two circles are not equal



Circles










share|cite|improve this question















I have to find the coordinates of the tangent points on 2 semi-circles that the center of one of them has an offset of x and y from the center of the other one, I need to draw a tangent line between them, hence the starting and ending point of this line will not be on the semicircles , but I should continue the semi-circles along their perimeter to these start and endpoints, I need to know how could I calculate the start and end point coordinates.



I need the most general case, in which the radius of two circles are not equal



Circles







discrete-mathematics analytic-geometry






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Nov 19 at 20:48

























asked Nov 19 at 20:26









FabioSpaghetti

11




11












  • Your question is too vague. You don't even say whether your semi-circles have the same radius or not ...
    – Jean Marie
    Nov 19 at 20:38










  • Have you chcked the image? you can visually say if they have or not ? but I want the most general case and will edit the question. is my question too vague just because of this point ?
    – FabioSpaghetti
    Nov 19 at 20:48










  • I hadn't seen there is an image...
    – Jean Marie
    Nov 19 at 20:51










  • No, your question is too vague because there is no answer possible unless you give the coordinates of the center of the first circle and the radii of the two circles.
    – Jean Marie
    Nov 19 at 20:56










  • The coordinates of the center of the first circle is known and also the radii of both circles !! As far as I see, I have tagged it in analytical geometry, so it should have an analytical answer. clearly every paramter can be counted in if it's required to be one of the known
    – FabioSpaghetti
    Nov 19 at 21:54




















  • Your question is too vague. You don't even say whether your semi-circles have the same radius or not ...
    – Jean Marie
    Nov 19 at 20:38










  • Have you chcked the image? you can visually say if they have or not ? but I want the most general case and will edit the question. is my question too vague just because of this point ?
    – FabioSpaghetti
    Nov 19 at 20:48










  • I hadn't seen there is an image...
    – Jean Marie
    Nov 19 at 20:51










  • No, your question is too vague because there is no answer possible unless you give the coordinates of the center of the first circle and the radii of the two circles.
    – Jean Marie
    Nov 19 at 20:56










  • The coordinates of the center of the first circle is known and also the radii of both circles !! As far as I see, I have tagged it in analytical geometry, so it should have an analytical answer. clearly every paramter can be counted in if it's required to be one of the known
    – FabioSpaghetti
    Nov 19 at 21:54


















Your question is too vague. You don't even say whether your semi-circles have the same radius or not ...
– Jean Marie
Nov 19 at 20:38




Your question is too vague. You don't even say whether your semi-circles have the same radius or not ...
– Jean Marie
Nov 19 at 20:38












Have you chcked the image? you can visually say if they have or not ? but I want the most general case and will edit the question. is my question too vague just because of this point ?
– FabioSpaghetti
Nov 19 at 20:48




Have you chcked the image? you can visually say if they have or not ? but I want the most general case and will edit the question. is my question too vague just because of this point ?
– FabioSpaghetti
Nov 19 at 20:48












I hadn't seen there is an image...
– Jean Marie
Nov 19 at 20:51




I hadn't seen there is an image...
– Jean Marie
Nov 19 at 20:51












No, your question is too vague because there is no answer possible unless you give the coordinates of the center of the first circle and the radii of the two circles.
– Jean Marie
Nov 19 at 20:56




No, your question is too vague because there is no answer possible unless you give the coordinates of the center of the first circle and the radii of the two circles.
– Jean Marie
Nov 19 at 20:56












The coordinates of the center of the first circle is known and also the radii of both circles !! As far as I see, I have tagged it in analytical geometry, so it should have an analytical answer. clearly every paramter can be counted in if it's required to be one of the known
– FabioSpaghetti
Nov 19 at 21:54






The coordinates of the center of the first circle is known and also the radii of both circles !! As far as I see, I have tagged it in analytical geometry, so it should have an analytical answer. clearly every paramter can be counted in if it's required to be one of the known
– FabioSpaghetti
Nov 19 at 21:54

















active

oldest

votes











Your Answer





StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "69"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3005477%2fhow-to-find-the-coordinates-of-the-tangency-points-on-direct-common-tangent-line%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown






























active

oldest

votes













active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Mathematics Stack Exchange!


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


Use MathJax to format equations. MathJax reference.


To learn more, see our tips on writing great answers.





Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


Please pay close attention to the following guidance:


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3005477%2fhow-to-find-the-coordinates-of-the-tangency-points-on-direct-common-tangent-line%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

Biblatex bibliography style without URLs when DOI exists (in Overleaf with Zotero bibliography)

ComboBox Display Member on multiple fields

Is it possible to collect Nectar points via Trainline?