Question

What is the area of the gray triangle shown?
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Answer 1

112.5 square units

Explanation:

Area = 1/2bh

where b = 15 and h = 15 (you can look at the graph)

So A = 1/2(15)(15) = 225/2 = 112.5 square units

Answer

112.5 square units

Answer 2

The area of the triangle is basically half the area of the square, so we only need to find the area of the square and divide it by 2:

S = (15 · 15)/2 = 112.5 (square units)