Area of a Square MathHelp.com

My sister is supposed to find the area of the green square, but neither of us understand how to find it given only these measurements. How should she go about it?

3 Ways to Find the Area of a Square - wikiHow

Area of a Trapezoid MathHelp.com

Lesson 12 - Area Of A Rectangle (Geometry Tutor)

How to Find the Area of a Square or Rectangle

Area of a Square - MathHelp.com - Math Help

Math Help! : r/ACT

Suppose you know the area of a square. How can you find its perimeter?, CLASS 8

How to find the area of a rectangle — Krista King Math