Quickk!
find the area of the shaded region.

16. To find the area of a triangle, the formula is B (base) x H (height) x 1/2. The base of the shaded triangle is 4, and the height of the shaded triangle is 8. Times that together, you get 32. Times 1/2 means divide it by a half, so 32 divided by 2 equals to 16.

Find the area of the not shaded area, 1/2 base times height.
2.5 x 8 = 20

find the area of the shaded area, 1/2 base times height again.
4.5 x 8 = 36

subtract not shaded area from shaded area
36 - 20 = 16

Google it that might work