Answer:

1. A = 283.385 cm

2. A = 153.86 cm

3. A = 907.46 cm

4. A = 63.585 m

5. A = 1,256 cm

Step-by-step explanation:

solution:

1. radius = 9.5 cm

A= (3.14) (9.5x9.5)

= 3.14 (90.25)

= 283.385cm

2. diameter=14cm

A= (3.14) (14/2)

= 3.14 (7x7)

= 3.14 x 49

= 153.86cm

3. radius=17cm

A= (3.14) (17x17)

=3.14 (289)

=907.46cm

4. diameter= 9m

A= (3.14) (9/2)

= 3.14 (4.5x4.5)

= 3.14 x 20.25

= 63.585 m

5. radius=20cm

A= (3.14) (20x20)

= 3.14 x 400

=1,256cm