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Is there a formula to find out the circumcentre of a triangle if you know its vertices in the coordinate plane?
Dear karthik,
The circumcentre of a triangle is the point which is the center of a circle that includes the vertices of the triangle on its circumference.
Thus, each side of the triangle is a chord of the circle. Since the perpendicular bisector of a chord is a line that goes through the center of the circle, you need to find the equations of the perpendicular bisectors of two of the sides and then find the intersection of those two lines.
Choose two sides and use the midpoint formula to find their midpoints. Then determine the slopes of these same sides and from those, the slopes of lines perpendicular to those sides. This gives you enough information to write the two equations of the perpendicular bisectors. Then you can find the intersection which is the circumcentre (circumcenter).
Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation. All the best. Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian. Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar respectively : Click here to download the toolbar.. Askiitians Expert Sagar Singh B.Tech, IIT Delhi
Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.
All the best.
Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.
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Askiitians Expert
Sagar Singh
B.Tech, IIT Delhi
let the circumcentre be (x.y) then we know pa2=pb2 and pa2=pc2 and u will get 2equations solve for x and y u will get the circumcentre....
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