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Verified answer
MAPEL = MATEMATIKAKELAS = 8
BAB = BANGUN RUANG
diketahui =
alas segitiga = 10cm
sisi kaki segitiga = 13cm
tinggi prisma = 50cm
ditanya = luas permukaan prisma??
mencari tinggi alas
t = √13² - 5²
t = √169 - 25
t = √144
t = 12cm
L.P.prisma = (2 × L.alas) + (kll.alas × T.prisma)
= ( 2 × ½ × 10 × 12 ) + ( (10 + 13 + 13) × 50 )
= ( 120 ) + ( 36 × 50 )
= 120 + 1800
= 1920cm²
semoga membantu
Verified answer
Diket :s1 = 10 cm
s2 = 13 cm
s3 = 13 cm
t.p = 50 cm
Jawaban :
Tinggi segitiga dapat diperoleh dari pythagoras ini.
t = √13^2-(10/2)^2
t = √169-25
t = √144
t = 12 cm
Luas alas = a x t/2
L = 10 x 12/2
L= 120/2
L1 = 60 cm^2
Luas sisi 2 = s1 x t.p
L = 10 x 50
L2 = 500 cm^2
Luas sisi 3 = s2 x t.p
L = 13 x 50
L3 = 650 cm^2
Luas permukaan = 2(L1)+L2+2(L3)
L = 2(60)+500+2(650)
L = 120+500+1300
L = 1920 cm^2