Question

In parallelogram ABCD, diagonals AC and BD intersect at point E, BE=x+21, and DE=4x.

What is BD?
Enter your answer in the box.

Answer 1

BD = 56

Explanation:

x + 21 = 4x

3x = 21

x = 7

x + 4x + 21

5x + 21

35 + 21

56