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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?`
7 years ago

SAGAR SINGH - IIT DELHI
879 Points
```										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).

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.

Sagar Singh
B.Tech, IIT Delhi

```
7 years ago
OCEAN GODRE
40 Points
```										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....
```
7 years ago
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