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Sebuah [tex] \frac{3}{4} [/tex] lingkaran memiliki diameter 20 cm tentukan luas.
Sebuah [tex] \frac{3}{4} [/tex] lingkaran memiliki diameter 20 cm tentukan luas.
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Jawaban:
235,5 cm²
Penjelasan dengan langkah-langkah:
d = 20 cm
r = 20 : 2 = 10 cm
L = ¾ πr²
= ¾ . 3,14 × 10²
= ¾ . 3,14 × 100
= 3 . 3,14 . 25
= 3 . 78,5
= 235,5 cm²
d = Diameter
r = Jari – jari