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4. K = 2 . π . r
= 2 . 22/7 . 14
= 88
8. K = 2 . π . r
= 2 . 3,14 . 20
= 125,6
Bagian III
1. Luas bangun = Ltrapesium + Lpersegi
= 432 + 144
= 576
3. Luas bangun = Lpersegi panjang + Ltrapesium + Lpersegi
= 192 + 110 + 196
= 498
Maaf cuma bisa ngebantu segitu doang,gambarnya kurang jelas, angka angka nya gakebaca, maaf