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salah satu diagonal = 16
=10"- 8"
=100-64
=36
=6
I. d1=16
d2=12(6+6)
II. LUAS BELAH KETUPAT= 1/2 x d1 x d2
= 1/2 x 16 x 12
= 8 x 12
= 96cm2