Answer: 47.52 cm
Step-by-step explanation:
The area of a circle is given by the formula A=πr^2. The area of a semicircle is half of a circle, so the equation is A=1/2πr^2. The diameter of the semicircle is 11 cm, so the radius is 11/2 = 5.5 cm.
Putting the numbers into the equation:
A = 1/2π(5.5)^2
A = 47.52 cm