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= 6
t = √ 10² - 6²
= √ 100 - 36
= √ 64
= 8
luas = (a+b) x t/2 + ( 1/2 x a x t)
= ( 4+10) x 8/2 + ( 1/2 x 10 x 10)
= 14 x 4 + 5 x 10
= 56+50
= 106 cm²