AD / sin 90° = t / sin 60°
10 / 1 = t / ½√3
10 = t / ½√3
t = 10 × ½√3
t = 5√3 cm
Luas jajar genjang
= alas × tinggi
= 18 × 5√3
= 90√3 cm²
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AD / sin 90° = t / sin 60°
10 / 1 = t / ½√3
10 = t / ½√3
t = 10 × ½√3
t = 5√3 cm
Luas jajar genjang
= alas × tinggi
= 18 × 5√3
= 90√3 cm²