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materi : bangun ruang
sub bab : volume dan luas prisma
gambar di atas merupakan prisma trapesium
diketahui :
alas bawah = a = 5
alas atas = b= 2
tinggi trapesium = 4cm
tinggi prisma = 10cm
ditanya :
volume prisma dan luas prisma
jawab:
V PRISMA = Lalas x tinggi
=(a + b ) t /2 x 10
=( 5 + 2 ) 4 /2 x 10
= 14 x 10
= 140 cm³
Lprisma
BC = √4² + 3²
BC = √ 16 + 9
BC = √25
BC = 5
L = 2.L trapesium + Ktrapesium x tinggi
= 2.140 + (5+2+5+4) x 10
= 280 + 160
= 440