Answer:
Perimeter b = circumference b = 10π; Area b = 50π
Perimeter c = circumference c = 10.5π; Area b = 27π
Step-by-step explanation:
b. Circumference = perimeter
Circumference of semicircle= πr=10π =Perimeter
Area of semi circle=πr^2/2=10^2π/2=50π
c. Circumference = 7/4πr=1.75*6π=10.5π=Perimeter
Area of the diagram = 3/4πr^2=0.75π*6^2=0.75π*36=27π
