nomor 1
cm²
nomor 3
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nomor 1
cm²
nomor 3
cm²
= 1/5 x 3,14 x 400
= 1.256/5
= 251,2 cm²
3. Luas juring ROS = 45°/360° x 22/7 x 28²
= 1/8 x 22/7 x 784
= 22 x 784/56
= 22 x 14
= 308 cm²