Question

Jika panjang sisi persegi 20 cm, maka luas daerah yg di arsir adalah,??

Answer 1

A) Lpersegi= 20 x 20
= 400


b) Ljuring= 90/360 x 3,14 x 20 x 20
= ¼ x 1256
= 314
Lsegitiga = ½ x 20 x 20
= 200
Ltembereng = Ljuring - Lsegitiga
= 314 - 200
= 114
L() = 2 x Ltembereng
= 2 x 114
= 228

c) Larsiran = Lpersegi - L()
= 400 - 228
= 172

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