BaNGUn DatarLIngkaran
3. Luas = 154π r² =154r² = 154/ π = 154/. (22/7)r² = 49r = √49r= 7
jari jari = 7 cm
4. Luas = 1.386 π r² = 1.386r² = 1.386/πr² = 1.386 / (22/7)r² = 441r = √441r= 21jari jari = r= 21 cm diametr = 2r = 2(21) = 42 cm
5. rA ;r B = 3 : 5rA = 9 rB = 5/3 x rArB = 5/3 x 9 = 15luas lingkaran B = π rB²LB = 3,14 x 15 x 15LB = 706,5 cm²
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Verified answer
BaNGUn Datar
LIngkaran
3. Luas = 154
π r² =154
r² = 154/ π = 154/. (22/7)
r² = 49
r = √49
r= 7
jari jari = 7 cm
4. Luas = 1.386
π r² = 1.386
r² = 1.386/π
r² = 1.386 / (22/7)
r² = 441
r = √441
r= 21
jari jari = r= 21 cm
diametr = 2r = 2(21) = 42 cm
5. rA ;r B = 3 : 5
rA = 9
rB = 5/3 x rA
rB = 5/3 x 9 = 15
luas lingkaran B = π rB²
LB = 3,14 x 15 x 15
LB = 706,5 cm²