Bagaimana cara + Jawaban Keliling & Luas No 4 & 5
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rumus luas lingkaran = 2πr²
no 4 = seperempat lingkaran
jadi 3,14 x 2(14) x 1/4= 21,98 (keliling)
luas= 2(3,14)x14²x1/4 = 307,72
no 5 = tiga per empat lingkaran
3,14 x 2(21) x 3/4 = 98,91 (keliling)
2(3,14)x21²x3/4 = 2077,11