Sketch the following points in space three, A (4,5,3); B (1,7,4) and C (2,4,6). Prove that point A, point B and point C form an equilateral triangle!

1.3 (3) The ABC triangle has the vertices A(-1, 3, 2), B(-1, 5, 2) and C(1, 5, -2). A) Demonstrates that the AABC is a rectangular. B) Calculates the measurement of the two acute angles.

Are the points collinear?

Let 0(0,0), P(3,4), Q(6,0) be the vertices of the triangle OPQ. The point R lies inside the triangle OPQ such that the triangles OPR, PQR, OQR have the same area. The coordinates of point R are... A. G.3) (3.) (3) D. ) А. В. С. 4 2 B.