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22/7 x 14²
22/7 x 196
616 cm²
Ditanya : L = ...?
Jawab : d = 2r
28 cm = 2r
r = 28 cm ÷ 2
= 14 cm
L = π × r²
= × (14 cm)²
= × 196 cm²
= 616 cm²