Answer:
45cm^2
Step-by-step explanation:
Area of shaded region = area of outer triangle – area of the unshaded triangle
the area of a triangle is (base × height) ÷ 2
Area of outer triangle:
(12 × 5) ÷ 2 = 30cm^2
the area of the unshaded triangle:
(15 × 10) ÷ 2 = 75cm^2
area of shaded region = 75 - 30 = 45cm^2
