DATE: NO. 1. Find the lengths of the sides of triangle ABC and state whether the triangle is a right triangle, an isosceles, or both. A(2,1,3), B(3,-1,-2), C(0,2,-1) 2. Find the coordinates of the three points. which divide the given segment AB into four equal parts. A(1, -6,0), B(6, 12,7) 3. Find the lengths of the medians of the given triangles ABC. A(4,3, 1), B(a,1,2), C(0,2,4) 4. An endpoint P of a line segment, and a midpoint of the same line segment are given. Find the other endpoint. P (1, -3, 1), Q (1,2,-3)