Given the vertices A(10,4),B(-4,9) and c(-2,-1) of `triangleABC`, find the equation of the median through A.

Given vertices A (1, 1), B (4, -2) and C (5, 5) of a triangle, find the equation of the perpendicular dropped from C to the interior bisector of the angle A.

The vertices of a triangle are A(10,4) ,B(-4,9) and C(-2,-1). Find the equation of the altitude through A.

For the triangle ABC whose vertices are A (-2, 3), B (4, - 3) and C (4, 5), find the equation of : the st. line through A parallel to the opposite side BC.

If A(-1, 6), B(-3, -9) and C(5, -8) are the vertices of a triangle ABC , find the equations of its medians.

The vertices of a triangle PQR are P(2, 1), Q (-2,3) and R (4, 5). Find the equation of the median through the vertex R.

Show that the points A(2,3,4),B(-1,2,-3) and C(-4,1,-10) are collinear. Find the equations of the line in which they lie.

For the triangle ABC whose vertices are A (-2, 3), B (4, - 3) and C (6, 5), find the equation of : the altitude from A.

In the triangle with vertices A (2, 3), B (4, -1) and C (-1,2), find the equation and length of the altitude from the vertex A.

In the triangle ABC with vertices A (2, 3), B (4,-1) and C (1, 2), find the equation and length of altitude from the vertex A.

Let A(1, 2, 3), B(0, 0, 1) and C(-1, 1, 1) are the vertices of triangleABC . The equation of altitude through B to side AC is