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= (pxl) - 1/2. phi. r*2
= 20 x 30 - 1/2. 3,14. 10*2
= 600 - 1/2. 3,14 .100
= 600 - 1/2. 314
= 600 - 157
= 443 cm*2
l= 20cm
lingkaran= d= 20cm
r= 10cm
?: luas yang diarsir
L persegi: s×s
:20cm × 20cm
:400cm²
L lingkaran: 1/2× Π×r×r
: 1/2 × (3.14 × 10 × 10)
: 1/2 × 314
:157cm²
?: luas yang diarsir:
L persegi - L lingkaran
400cm² - 157cm²
243cm²
smoga membantu :D