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yg no 5 coba kerjakanlah sendiri...
3. L.trapesium=(a+b)×t/2=(8+14)×4/2×=22×4/2=88/2=44 cm².
l.persegi=s×s=8×8=64 cm²
44+64=108 cm².
4.L.jajargenjang=a×t=15×8=120 cm²
L.persegi=s×s=6×6=36 cm²
120+36=156 cm².
petunjuk no5:
no5 ada 2 trapesium,maka carilah luas trapesium masing-masing lalu luas trapesium 1+ luas trapesium2=.....
jelas bukan???