Answer:
Area of the composite figure = 361.25cm²
Explanations:
The composite figure consists of a cone and semicircle
Area of the semicircle = 0.5πr²
The diameter of the semicircle = 18 cm
The radius, r = diameter/2
r = 18/2
r = 9 cm
Area of the semicircle = 0.5πr²
Area of the semicircle = 0.5 x 3.142 x 9²
Area of the semicircle = 127.25cm²
Area of the triangle = 0.5 x base x height
Area of the triangle = 0.5 x 18 x 26
Area of the triangle = 234 cm²
Area of the composite figure = Area of the semicircle + Area of the triangle
Area of the composite figure = 127.25cm² + 234 cm²
Area of the composite figure = 361.25cm²