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tinggi = √(2x)² - (1/2 alas)²
= √4x² - (1/2 . 2x)²
= √4x²-x²
=√3x²
= x√3
luas = 1/2 alas x tinggi
100√3= 1/2 * 2x * x√3
100√3= x²√3
100 = x²
10 = x
tinggi = x√3
= 10√3