1. yang bukan adalha C, krn Llingkaran=1/4*π×d² bukan L=1/2×π×d²
2.K=π×d
132=22/7×d
132×7=22×d
d=924:22
d=42 cm (D)
3. L=π×r²
616=22/7×r²
616×7=22×r²
4312=22r²
r²=√4312:22
r=√196
r=14 cm (A)
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1. Jawabannya C.
Contoh :
L = 1/2×phi×d²
L1/2×22/7×14² = 616
L = π × r²
L = 22/7 × 7²
L = 154 cm
(Hasilnya berbeda)
2. K = π × d
132 cm = 22/7 × d
D = 132 cm ÷ 22/7
D = 132 × 7/22
D = 6 × 7
D = 42 cm
3. L = π × r × r
616 cm² = 22/7 × r × r
r² = 616 ÷ 22/7
r² = √196
r = 14 cm
1. yang bukan adalha C, krn Llingkaran=1/4*π×d² bukan L=1/2×π×d²
2.K=π×d
132=22/7×d
132×7=22×d
d=924:22
d=42 cm (D)
3. L=π×r²
616=22/7×r²
616×7=22×r²
4312=22r²
r²=√4312:22
r=√196
r=14 cm (A)