Geometry help!!! Answers asap.. thnx!?!!?

Question

The midpoints of the sides of a triangle are A(-3,-4), B(2,1), C(-2,5). Find the vertices of the triangle.

Answer 1

Step 1: Form a triangle between A, B, and C. Then, invert the triangle, so that it goes from A, B, and D. D will be the first vertice.

C is (1,9) from A, so D will be (-1,-9) from B, making it (1,-8).

Vertice 1 (D): (1,-8)
Vertice 2 (F): Segment DF has midpoint A. A is (-4, 4) from D, so F is (-4,4) from A. F is (-7, 0)
Vertice 3 (G): Segment DG has a midpoint B. B is (1,9) from D, so G is (1,9) from B. G is (3,10)