Answer:
1. A= 254.34 cm²
2. A= 113.04 cm²
3. A= 50.24 ft²
4. A= 706.5 cm²
5. A= 12.56 m²
6. A= 38.456 m²
Step-by-step explanation:
1. A= π × r × r
= 3.14 × 9 × 9
= 3.14 × 81
= 254.34 cm²
2. Find the the radius first
r= d ÷ 2
= 12 ÷ 2
= 6
A= π × r × r
=3.14 × 6 × 6
= 3.14 × 36
= 113.04 cm²
3. A= π × r × r
= 3.14 × 4 × 4
= 3.14 × 16
= 50.24 ft²
4. Find the the radius first
= 30 ÷ 2
= 15
= 3.14 × 15 × 15
= 3.14 × 225
=706.5 cm²
5. A= π × r × r
= 3.14 × 2 × 2
= 3.14 × 4
= 12.56 m²
6. A= π × r × r
= 3.14 × 3.5 × 3.5
= 3.14 × 12.25
= 38.465 m²
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Answer:
1. A= 254.34 cm²
2. A= 113.04 cm²
3. A= 50.24 ft²
4. A= 706.5 cm²
5. A= 12.56 m²
6. A= 38.456 m²
Step-by-step explanation:
1. A= π × r × r
= 3.14 × 9 × 9
= 3.14 × 81
= 254.34 cm²
2. Find the the radius first
r= d ÷ 2
= 12 ÷ 2
= 6
A= π × r × r
=3.14 × 6 × 6
= 3.14 × 36
= 113.04 cm²
3. A= π × r × r
= 3.14 × 4 × 4
= 3.14 × 16
= 50.24 ft²
4. Find the the radius first
r= d ÷ 2
= 30 ÷ 2
= 15
A= π × r × r
= 3.14 × 15 × 15
= 3.14 × 225
=706.5 cm²
5. A= π × r × r
= 3.14 × 2 × 2
= 3.14 × 4
= 12.56 m²
6. A= π × r × r
= 3.14 × 3.5 × 3.5
= 3.14 × 12.25
= 38.465 m²