Question 178386
OK I believe you are talking about a parallelogram with its 2 diagonals drawn in. (The diagonals of a parallelogram always bisect the angles, and more importantly, always bisect each other.) So, write 2 equations with the lengths of the diagonals. Each diagonal is split in half (bisected), so the 2 halves are equal. Use the first diagonal to solve for f. Then use that value and the second diagonal to solve for g.