Question

luas daerah yg diarsir adalah..
pake caranya ya

Answer 1

Diameter 1/2 lingkaran besar = 2.8 + 2.8 + 1.4 = 7 m=>R=3.5 m

Luas 1/2 lingkaran besar = R × R ×22/7 ×1/2

= 3.5 ×3.5×22/7×1/2

= 19.25

Luas lingkaran kecil (r=1.4) = r × r ×22/7×1/2

= (1.4 ×1.4×22/7×1/2) × 2

= 3.08 ×2

=6.16

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Luas yang diarsir = 19.25 - 6.16 = 13.09 m2