Question

What is the area of the semicircle (use 3.14 for p)? Please help! Will mark brainlyest.

Answer 1

Answer: the first option: 127.17cm2

Step-by-step explanation:

1. divide the diameter in half to get the radius.

2. multiply the radius squared by pie

3. divide that answer in half

so:

9*9=81

81*3.14= 254.34

254.34/2= 127.17

Answer 2

Answer:

127.17 cm²

Step-by-step explanation:

• Area of a semicircle: 1/2*π*r²
• π (pi) = 3.14
• r (radius) = d (diamater) / 2 => 18/2 = 9 cm

A = 1/2*π*r²

A = 1/2*3.14*9²

A = 1/2*3.14*81

A = 3.14*40.5

A = 127.17 cm²

Therefore, the area of the semicircle is 127.17 cm²

Hope this helps!