Respuesta :
Answer:
A = 81π cm²
Step-by-step explanation:
The formula for area of a circle is A = πr², where r is the radius. The radius is half the diameter, so our radius for this problem is
18/2 = 9. So the area is..
A = π(9²) = π(81)
A = 81π cm²
Answer:
A = 81π cm²
Step-by-step explanation:
The formula for area of a circle is A = πr², where r is the radius. The radius is half the diameter, so our radius for this problem is
18/2 = 9. So the area is..
A = π(9²) = π(81)
A = 81π cm²
