Question

How to prove that only one circle can pass through three given non collinear points

Answer 1

. Who discovered vaccine for the first time?

Answer.

Edward Jenner discovered vaccine for the first time.

8. Alloy cannot be separated by physical means, though it is considered a mixture. Why?

Answer 2

There is one and only one circle passing through three given non-collinear points. To prove: There is one and only one circle passing through the points P, Q and R. Draw perpendicular bisectors AB of PQ and CD of QR. Let the perpendicular bisectors intersect at the point O.