Hitunglah luas dan keliling lingkaran di samping
Keliling Lingkaran
K = ¾( π × d ) + d
K = ¾( 22/7 × 28 ) + 28
K = ¾( 22 × 4 ) + 28
K = ¾( 88 ) + 28
K = 66 cm + 28 cm
K = 94 cm
Luas Lingkaran
L = ¾( π × r² )
L = ¾( 22/7 × 14 × 14 )
L = ¾( 22 × 2 cm × 14 cm )
L = ¾( 44 cm × 14 cm )
L = ¾( 616 cm² )
L = 462 cm²
Semoga bisa membantu
Penyelesaian:
d=28cm
r=28÷2=14cm
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L=¾×Πr²
L=¾×22/7×14×14
L=¾×22×2×14
L=¾×616
L=462cm²
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K=¾Πd r+r
K=¾×22/7×28+14+14
K=¾×22×4+28
K=3×22+28
K=94cm
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