Answer:

254.34 cm²

1,962.5 cm²

A = πr²

1. A = πr²

A = (3.14)(9 cm)²

A = (3.14)(81 cm²)

A = 254.34 cm²

2. (note: the given is diameter so we need to change it into radius to find the area of the circle)

given: diameter of 50 cm

solve for the radius:

r = d/2

r = 50/2

r = 25 cm

solve for the area of the circle:

A = πr²

A = (3.14)(25 cm)²

A = (3.14)(625 cm²)

A = 1,962.5 cm²