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b = 24 cm
a² + b² = c²
18² + 24² = c²
324 + 576 = c²
900 = c²
√900 = √c²
30 = c
Ka = a + b + c
= 18 cm + 24 cm + 30 cm
= 72 cm
La = 1/2 × a × t
= 1/2 × 18 cm × 24 cm
= 9 cm × 24 cm
= 216 cm²
LP = 2(La) + (Ka × t)
= 2(216) + (72 × 20)
= 432 + 1440
= 1872 cm²
Jadi luas permukaan prisma tersebut adalah 1872 cm²
Luas Pemukaan
= ( 2 x l.alas ) + ( K. alas ) x t. prisma
= ( 2 x 1/2 x a x t ) + ( ab + bc + ca ) x t. prisma
= ( 2 x 1/2 x 18 x 24 ) + ( 18 + 24 + 30 ) x 20
= 432 + ( 72 x 20 )
=
Sisi miring =
=
=
= 30 cm