### Home > ACC6 > Chapter 5 Unit 5 > Lesson CC1: 5.3.1 > Problem5-71

5-71.

Bianca is trying to find the area of this rectangle. She already measured one side as $10$ cm. Which other length(s) could she measure to use in her area calculation? Explain your reasoning.

How do you find area of a rectangle?

If $10$ cm is the base of the rectangle, which lengths could be the height?
You might want to rotate your paper so that the placement of the rectangle is more familiar.

The base and height must be perpendicular.