Answer:
A A = πr²
= 3.14 × ( 40 × 40 )
= 3.14 × 1,600
= 5,024 mm²
B A = πr²
= 3.14 × ( 2.8 × 2.8 )
= 3.14 × 7.84
= 24.6176 m²
C A = πr²
= 3.14 × ( 15 × 15 )
= 3.14 × 225
= 706.5 units²
D A = πr²
= 3.14 × ( 9 × 9 )
= 3.14 × 81
= 254.34 cm²
E A = πr²
= 3.14 × ( 142.8 × 142.8 )
= 3.14 × 20,391.84
= 64,030.3776 mm²
F A = πr²
= 3.14 × ( 15.3 × 15.3 )
= 3.14 × 234.09
= 735.0426 cm²
G A = πr²
= 3.14 × ( 9.42 × 9.42 )
= 3.14 × 88.7364
= 278.632296 ft²
H A = πr²
= 3.14 × ( 21.98 × 21.98 )
= 3.14 × 483.1204
= 1516.998056 yd²
I A = πr²
= 3.14 × ( 15 × 15 )
= 3.14 × 225
= 706.5 ft²
J A = πr²
= 3.14 × ( 56 × 56 )
= 3.14 × 3,136
= 9847.04 in²
I hope this helps... Please correct my answers if it is wrong.
