Jawaban:
1. L = π r ( r + s )
= 22/7 × 7 ( 7 + 21 )
= 22 × 28
= 616 cm²
2. L = π r ( r + s )
= 3,14 × 10 × ( 10 + 10 )
= 3,14 × 10 × 20
= 628 cm²
3. L = 4 π r²
= 4 × 22/7 × (7)²
= 4 × 22/7 × 49
= 4 × 22 × 7
4. L = 4 π r²
= 4 × 3,14 × (10)²
= 4 × 3,14 × 100
= 1.256 cm²
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Jawaban:
1. L = π r ( r + s )
= 22/7 × 7 ( 7 + 21 )
= 22 × 28
= 616 cm²
2. L = π r ( r + s )
= 3,14 × 10 × ( 10 + 10 )
= 3,14 × 10 × 20
= 628 cm²
3. L = 4 π r²
= 4 × 22/7 × (7)²
= 4 × 22/7 × 49
= 4 × 22 × 7
= 616 cm²
4. L = 4 π r²
= 4 × 3,14 × (10)²
= 4 × 3,14 × 100
= 1.256 cm²