Tolong jawab no delapan

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Tolong jawab no delapan

Tolong jawab no delapan

A)20×5=100cm²
20×9=180cm²
6+9×4×½=15×2=30cm²×2=60cm²
20×6=120cm²
20×4=80cm²
Lp=100+180+60+120+80=520cm²

b)V=La(trapesium)×t
=6+9×4×½×20
=15×2×20=600cm²