GRE Sample Test 4 Quantitative Reasoning 2

The shaded region is a right triangle. So, use the numbers on the grid to calculate the base and height of the triangle. The length horizontally is (−2.0) − (−0.5) = −2.0 + 0.5 = −1.5. Distances are always positive, so use 1.5 as the base of the triangle. The height of the triangle is 1.6 − 0.4 = 1.2. Use the equation for the area of a triangle:
A = $\frac{1}{2}\mathit{b}\mathit{h}$ = $\frac{1}{2}$ x 1.5 x 1.2 = 0.9
The area is 0.9.