1.)r=30cm
L=πr²
L=3,14×30×30
L=3,14×900
L=2.826cm²
.
2.)r=35cm
L=22/7×35×35
L=22×5×35
L=3.850cm²
3.)d=10cm
L=¼πd²
L=¼×3,14×10²
L=¼×314
L=78,5cm
4.)d=56cm
L=¼×22/7×56×56
L=¼×22×8×56
L=2×22×56
L=2.464cm²
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1.)r=30cm
L=πr²
L=3,14×30×30
L=3,14×900
L=2.826cm²
.
2.)r=35cm
L=πr²
L=22/7×35×35
L=22×5×35
L=3.850cm²
.
3.)d=10cm
L=¼πd²
L=¼×3,14×10²
L=¼×314
L=78,5cm
.
4.)d=56cm
L=¼πd²
L=¼×22/7×56×56
L=¼×22×8×56
L=2×22×56
L=2.464cm²
.
Semoga bermanfaat