Question

Can someone please help me asap

Answer 1

Area of semicircle= $\pi$r²
R is radius
So half of D is the radius, which is 14cm
So the answer is= $\pi$ x 14²
                          = 196$\pi$cm²

Answer 2

Normal circle area is πr², which is (d/2)²π.
That makes your case 14²π divided by 2 is 196π/2=98π cm²