Jawaban:
K = 70 cm
Penjelasan dengan langkah-langkah:
Cari tinggi dulu:
MN = √LM² - LN²
= √(25 cm)² - (20 cm)²
= √625 cm² - 400 cm²
= √225 cm²
= 15 cm
L = ½ · a · t
210 cm² = ½ · (20 cm + x) · 15 cm
210 cm² · 2 = (20 cm + x) · 15 cm
420 cm² = 300 cm² + 15x cm
420 cm² - 300 cm² = 15x cm
120 cm² = 15x cm
x = 120 cm²/15 cm
x = 8 cm
Jadi, KN = 8 cm
KM = √KN² + MN²
= √(8 cm)² + (15 cm)²
= √64 cm² + 225 cn²
= √289 cm²
= 17 cm
K = KN + LN + LM + KM
= 8 cm + 20 cm + 25 cm + 17 cm
= 70 cm
Jawaban:
70cm
Penjelasan dengan langkah-langkah:
MN = √ML² - LN
= √25² - 20²
= √625 - 400
= √225
= 15 cm
KN = L × 2 ÷ MN - LN
= 210 × 2 ÷ 15 - 20
= 420 ÷ 15 -20
= 28 - 20 = 8
KM = √MN² + KN²
= √15² + 8²
= √225 + 64
=√289
= 17
K = KM + ML + LN + KN
= 17 + 25 + 20 + 8
= 70cm
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