Answer:
161 units²
Explanation:
Area of 1 semicircle = 1/2 π (10 ÷ 2)²
Area of 1 semicircle =25π/2 units²
Area of 3 semicircles = 25π/2 x 3
Area of 3 semicircles = 75π/2 units²
Area of the equilateral triangle = √3/4 (10)²
Area of the equilateral triangle = 100√3/4 units²
Total area = 75π/2 + 100√3/4
Total area = 161 units²