Jawaban:
14. L = 136cm²
15. L = 96cm²
16. k = 40cm
17. L = 54cm²
Penjelasan dengan langkah-langkah:
14. L trapesium = (dc + ab):2 × t
t² = 10² - 6² = 64
t = akar(64) = 8cm
ab = 14 + 6
L trapesium = (14 + 14+6):2 × 8 = 136cm²
15. L = 1/2 × d1 × d2
d1 = 8 × 2 =16cm
d2 = 6 × 2 = 12cm
L = 1/2 × 16cm × 12cm = 96cm²
16. k = 4 × AD
AD² = 6² + 8² = 100
AD = akar(100) = 10
k = 4 × 10 = 40cm
17. L = 1/2at
a = BC
b = AB
BC²= 15² - 9² = 144
BC = akar(144) = 12cm
L = 1/2 × 12 × 9 = 54cm²
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Jawaban:
14. L = 136cm²
15. L = 96cm²
16. k = 40cm
17. L = 54cm²
Penjelasan dengan langkah-langkah:
14. L trapesium = (dc + ab):2 × t
t² = 10² - 6² = 64
t = akar(64) = 8cm
ab = 14 + 6
L trapesium = (14 + 14+6):2 × 8 = 136cm²
15. L = 1/2 × d1 × d2
d1 = 8 × 2 =16cm
d2 = 6 × 2 = 12cm
L = 1/2 × 16cm × 12cm = 96cm²
16. k = 4 × AD
AD² = 6² + 8² = 100
AD = akar(100) = 10
k = 4 × 10 = 40cm
17. L = 1/2at
a = BC
b = AB
BC²= 15² - 9² = 144
BC = akar(144) = 12cm
L = 1/2 × 12 × 9 = 54cm²