tentukan panjang MN pada gambar tersebut!
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MN² = ML² - NL²
MN² = 20² - (20/2)²
MN² = 400 - 10²
MN² = 400 - 100
MN² = 300
MN = √300
MN = 10√3 cm
ML² = MN² + NL²
20² = MN² + ( 20 ÷ 2 )²
( 20 × 20 ) = MN² + 10²
400 = MN² + ( 10 × 10 )
400 = MN² + 100
MN² = 400 - 100
MN² = 300
MN = √300
MN = √100 × √3
MN = 10 × √3
MN = 10√3 cm