SUPER EASY 9TH GRADE GEOMETRY
- find the area
![SUPER EASY 9TH GRADE GEOMETRY find the area class=](https://us-static.z-dn.net/files/d8c/fbb8c6c171674c3fc3e248617e1ae66d.png)
using the diagonal: area = 1/2 x diagonal^2
the full diagonal is 20 x 2 = 40 cm
area = 1/2 x 40^2 = 800
answer: 800 cm^2