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10 pangkat 2 - 8 pangkat 2 = (c pangkat 2) + 20
36 = (c pangkat 2) + 20
alas= 6+20= 26
luas trapesium= (20+26) x 8 x 1/2 = 184 cm2 A
4) A. 4, 6, 9 bukan phytagoras
5) keliling lapangan x 10
22/7 x 140 meter x 10
4400 meter D