→ no title ←
1][
d = √((rA + rB)² + rd²)
39² = (9 + rB)² + 36²
(9 + rB)² = 39³ - 36²
(9 + rB)² = (39 + 36)(39 - 36)
9 + rB = 15
rB = 6 cm ✔
Rasio luas A dan B
= rA² : rB²
= 9² : 6²
= 9 : 4 ✔
2][
sisi belah ketupat
= √((16/2)² + (12/2)²)
= 10 cm
Luas permukaan prisma
= 2 × luas alas + luas selimut
= 2 . 1/2 . 16.12 + (4 × 10) × 10
= 192 + 400
= 592 cm² ✔
Volum belketu
= luas alas × t
= 1/2 × 16 . 12 . 10
= 960 cm³ ✔
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→ no title ←
1][
d = √((rA + rB)² + rd²)
39² = (9 + rB)² + 36²
(9 + rB)² = 39³ - 36²
(9 + rB)² = (39 + 36)(39 - 36)
9 + rB = 15
rB = 6 cm ✔
Rasio luas A dan B
= rA² : rB²
= 9² : 6²
= 9 : 4 ✔
2][
sisi belah ketupat
= √((16/2)² + (12/2)²)
= 10 cm
Luas permukaan prisma
= 2 × luas alas + luas selimut
= 2 . 1/2 . 16.12 + (4 × 10) × 10
= 192 + 400
= 592 cm² ✔
Volum belketu
= luas alas × t
= 1/2 × 16 . 12 . 10
= 960 cm³ ✔