Answer:
60 cm^2
Step-by-step explanation:
The shaded triangle is a right-angled triangle, so you can use the Pythagorean theorem to calculate the length of the top side; the result is 15 cm. You then calculate the area as if it was a 15x8 rectangle, and divide it by two (if you put 2 of these triangles together, they'd form a rectangle). The result is 120/2, which is 60 cm^2.
