Find the base and use 1/2bh formula to find the area.

To find the base of this triangle, you can use Pythagorean Theorem, since it is a right triangle. In Pythagorean Theorem, you take the two sides as a and b, and the hypotenuse as c.

Pythagorean Theorem: a^2+b^2=c^2.

In this case: a^2+12^2=20^2.

After solving that: a^2=256.

Square root both sides.

a=16.

Now, you can find the area, given 1/2 of 12*16. 12*16=192. 192/2=96.

Your answer would be F. 96 cm^2.

Hope this helps!

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.