Answer: A) 200 square inches
Step-by-step explanation:
First, use Pythagorean Theorem to find the base of each triangle.
a2 + b2 =c2
20 with a 2 on top + b2=(28 1/4 on top) 2 on top
b2= 398.0625
b= 19.9515037
Finally, use the area of a triangle formula to find the area of each triangle.
A= 1/2bh
A=1/2 (19.9515037) (20)
A= 199.515037
Therefore, the area of each triangle is approximately 200 in².