CPM Homework Help : PC3 Problem 10-140

What are the dimensions of a rectangle whose width is $78\%$ of its length and has a diagonal of length $30$ cm?

Hint:

Draw and label a diagram.

Possible diagram:

Rectangle, bottom side labeled, L, right side labeled, 0.78 L, dashed diagonal from bottom left to top right, labeled 30.

Write and solve an equation using the Pythagorean Theorem.