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Verified answer
1) L = ½ × d1 × d2= ½ × 48 × 44
= 1.056 cm²
2) L = ½ × d1 × d2
= ½ × 24 × 20
= 240 cm²
3) L = ½ × d1 × d2
5.700 = ½ × 120 × d2
d2 = 5.700 ÷ 60
d2 = 95 cm
4) misal d1 = d2 = d
L = ½ × d1 × d2
800 = ½ × d × d
800 × 2 = d²
1600 = d²
d = √1600
d = 40 cm
jadi panjang kedua diagonal masing2 40 cm
5) luas 8 layang2
= 8 × ½ × d1 × d2
= 8 × ½ × 40 × 45
= 7.200 cm²
luas kertas
= p × l
= 80 × 125
= 10.000 cm²
sisa kertas
= 10.000 - 7.200
= 2.800 cm²