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Answer:
1. A = πr²
= 3.14 × ( 2 × 2 )
= 3.14 × 4
= 12.56 m²
2. A = πr²
= 3.14 × ( 3 × 3 )
= 3.14 × 9
= 28.26 ft²
3. A = πr²
= 3.14 × ( [ 8 ÷ 2 ] × [ 8 ÷ 2 ] )
= 3.14 × 16
= 50.24 cm²
4. A = πr²
= 3.14 × ( [ 6 ÷ 2 ] × [ 6 ÷ 2 ] )
= 3.14 × 9
= 28.26 m²
5. A = πr²
= 3.14 × ( 1.1 × 1.1 )
= 3.14 × 1.21
= 3.7994 ft²
6. A = πr²
= 3.14 × ( [ 10 ÷ 2 ] × [ 10 ÷ 2 ] )
= 3.14 × 25
= 78.5 cm²
7. A = πr²
= 3.14 × ( [ 8 ÷ 2 ] × [ 8 ÷ 2 ] )
= 3.14 × 16
= 50.24 cm²
8. A = πr²
= 3.14 × ( 10 × 10 )
= 3.14 × 100
= 314 in²
9. A = πr²
= 3.14 × ( 0.3 × 0.3 )
= 3.14 × 0.09
= 0.2826 yd²
10. A = πr²
= 3.14 × ( 0.9 × 0.9 )
= 3.14 × 0.81
= 2.5434 ft²
Step-by-step explanation:
I hope this helps... Please correct my answers if it is wrong.