Penjelasan dengan langkah-langkah:
KM = 20 cm → 90°
LM = ? → 45°
Aturan Sinus.
LM/sin 45° = KM/sin 90°
LM/(1/2 √2) = 20/1
LM/(1/2 √2) = 20
LM = 20√2/2
LM = 10√2 cm
Dengan ketentuan KL = LM
Mencari keliling.
= KL + LM + KM
= 10√2 + 10√2 + 20
= (10 + 10)√2 + 20
= (20√2 + 20) cm ✓
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Penjelasan dengan langkah-langkah:
KM = 20 cm → 90°
LM = ? → 45°
Aturan Sinus.
LM/sin 45° = KM/sin 90°
LM/(1/2 √2) = 20/1
LM/(1/2 √2) = 20
LM = 20√2/2
LM = 10√2 cm
Dengan ketentuan KL = LM
Mencari keliling.
= KL + LM + KM
= 10√2 + 10√2 + 20
= (10 + 10)√2 + 20
= (20√2 + 20) cm ✓