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= 15
diagoal lainnya
d = √ 17² - 15²
= √ 289 - 225
= √ 64
= 8
= 8 x 2
= 16
luas belah ketupat
L = D₁ x D₂ :2
= 16 x 30 : 2
= 16 x 15
= 240 cm²
jawabnnya 240 cm²
=√64
=8
luas=d1 x d2 /2
30 x 16/2
480/2
240