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d2 = √17²-8² = √289-64 = √225 = 15 cm x 2 = 30 cm
L = 16 x 30 /2 = 240 cm²
68 = 4s
s = 68 : 4 = 17 cm
d1 = 16 cm
d2 = √17² - 8² = √289 - 64 = √225 = 15 cm x 2 = 30 cm
Luas = 1/2 x d1 x d2
= 1/2 x 16 x 30
= 8 x 30
= 240 cm²