Question

Please help if u can

Answer 1

half circle so 1/2 times area

area=pir^2
d/2=r
d=5
5/2=2.5=r

area=pi2.5^2=6.25pi=19.625
times 1/2 to find half area
1/2 times 19.625=9.8125
hundreth
9.81 m²