tolong ya kak jawaban nomor 7, 8, 9, sama 10 sama cara nya tolong ya kak

7. L = 1/2 × (a + b) × t
477 = 1/2 × (a + 16) × 18
= a + 16 × 9
a = 477 : 9 - 16
= 53 - 16
= 37cm

8. L = 1/2 × (a + b) × t
504 = 1/2 × (a + 20) × 16
= a + 20 × 8
a = 504 : 8 - 20
= 63 - 20 = 43cm

9. L = 1/2 × (a × b) × t
820 = 1/2 × (52 × b) × 20
= 52 + b × 10
b = 820 : 10 - 52 = 82 - 52 = 30cm

10. L = 1/2 × (a × b) x t
1034 = 1/2 × (58 + b) × 22
= 58 + b × 11
b = 1034 : 11 - 58 = 94 - 58 = 36cm


"maaaf kalo salah"