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Penyiku < P = 90 -68 = 22
30. Luas Juring AOD = 120/80 x 60 = 90
35.
r= 1/2 (20 = 10
t = 34 - 10 = 24
V bangun = V kerucut + V 1/2 bola
V bangun = 1/3 π r² t + 2/3 π r³
V bangun = 1/3 π r² ( t + 2r)
V = 1/3 (π)(10²) (24+20)
V = 4.400/3 π = 1.466 ²/₃ π