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= ( 1/2 x 16 )² + ( 1/2 x 12 )²
= 8² + 6²
= 54 + 36
s belah ketupat = √100
= 10
LP = 2 La + Ka x t
= 2 ( 1/2 x 16 x 12 ) + 4 x 10 x 12
= 2 x 96 + 40 x 12
= 192 + 480
= 672 cm² ( tidak ada jawabannya )
6). LP = 2 La + Ka x t
= 2 ( 1/2 x ( 12 + 18 ) x 10 + ( 10 + 12 + 17 + 18 ) x 10
= 2 ( 1/2 x 30 x 10 ) + 57 x 10
= 2 x 150 + 570
= 300 + 570
= 870 cm² ( b )