1/4 lingkaran hitunglah luas dan keliling r =6 cm d =12 cm
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Luas 1/4 lingkaran :
= 1/4 × luas lingkaran
= 1/4 × phi × r^2
= 1/4 × 3,14 × 6cm^2
= 1/4 × 3,14 × 36 cm
= 1/4 × 113,04 cm
= 28,26 cm^2
Keliling 1/4 :
= 1/4 × keliling lingkaran
= 1/4 × 2 × phi × r
= 1/4 × 2 × 3,14 × 6 cm
= 1/4 × 6,28 × 6 cm
= 1/4 × 37,68 cm
= 9,42 cm
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