diket:
alas segitiga : 3m
sisi miring segitiga: 2.5m
tinggi prisma: 15m
keliling segitiga:
= 3 + 2.5 + 2.5
= 8m
cari tinggi alas (segitiga):
= 2.5² - 1.5²
= √62.5 - 22.5
=√40.0
= 2.0m
luas alas:
= a.t/2
= 3.2/2
= 3 m
luas permukaan prisma:
=(2×luas alas) + (kell. alas × tinggi)
=(2×3) + (8×15)
=6+120
=126 m²
jadi, jawabannya 126 m². maaf ya kalo salah :)
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diket:
alas segitiga : 3m
sisi miring segitiga: 2.5m
tinggi prisma: 15m
keliling segitiga:
= 3 + 2.5 + 2.5
= 8m
cari tinggi alas (segitiga):
= 2.5² - 1.5²
= √62.5 - 22.5
=√40.0
= 2.0m
luas alas:
= a.t/2
= 3.2/2
= 3 m
luas permukaan prisma:
=(2×luas alas) + (kell. alas × tinggi)
=(2×3) + (8×15)
=6+120
=126 m²
jadi, jawabannya 126 m². maaf ya kalo salah :)