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100 = 4s
100 : 4 = s
25 = s
d1 = 48 cm
maka d2?
d2 = 2 √25² - (48 : 2)²
d2 = 2 √25² - 24²
d2 = 2√625 - 576
d2 = 2√49
d2 = 2 x 7
d2 = 14 cm
luas = d1 x d2 x 1/2
luas = 48 x 14 x 1/2
luas = 48 x 7
luas = 336 cm²