Answer:
Area = 31.80862562 cm²
Step-by-step explanation:
11. Area of the shaded region = [tex]\frac{Central-angle}{360}[/tex] × π × r²
Central angle = 360° - (180° + 135°) = 45° [Angles at a point add up to 360°]
Radius (r) = [tex]\frac{18}{2}[/tex] = 9cm
Area = [tex]\frac{45}{360}[/tex] × π × (9cm)² = 31.80862562 cm²
