Question

10 The circumference of a circle is 123.2 cm. Calculate :
(1) the radius of the circle in cm.
(ii) the area of the circle in cm², correct to the nearest cm2.
(iii) the effect on the area of the circle if the radius is doubled.​

Answer 1

Answer:

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Answer 2

Answer:

the equation for circumference is C=2$\pi$r

123.2=2(3.14)r

123.2=6.28r  Divide

19.617cm=r

diameter=2r

d=39.235cm

A=$\pi$r2

A=3.14(19.617)2

Step-by-step explanation: