A (4,6) , B (-1,3) and C(2,-2) are three given points . Find the following :
equation of the perpendicular on BC from A

A (4,6) , B (-1,3) and C(2,-2) are three given points . Find the following : coordinates of the point equidistant from A,B,C and the distance of this point from A,B,C.

A(4,6),B(-1,3)andC(2,-2) are three given points . Find the length of the perpendicular from B on AC.

A(3,-1,2),B(2,-3,3) and C(1,-2,1) are three given points . Find the angle between the vectors vec(BA)and vec(BC) .

If A(-2,1),B(2,3) and C(-2,-4) are three points,find the angle between BA and BC.

A(1,0,4), B(0,-11,3), C(2,-3,1) are three points and D is the foot of the perpendicular from A on BC. Find the coordinates of D.

Vertices A(1,1) , B(4,-2) and (5,5) of a triangle are given , find the equation of the perpendicular dropped from C to the internal bisectorof the angle A.

Given two points A (-5, 2) and B (1, -4), find : equation of the perpendicular bisector of AB.