Question No .17 , Question No .16

Lesson#28
Question No .17
Q.17. The points (4,-2), (-2,4) and (5,5) are the vertices of a triangle. Find in-center of the triangle.
Question No .16
Q.16. Find the point which is equidistant from the points A (5,3), B (-2,2) and C (4,2). What is the radius of the circumcircle of the delta ABC?
Introduction to Analytical Geometry
chapter No 4
Exercise No 4.1
mathematics
part 2