Question: Find the radius of the circle from the figure.



A ) 6 cm
B ) 3 cm
C ) 5 cm
D ) 4 cm

Steps to derive

1 Diameter of a circle is a line segment passing through the center of the circle and whose end points lie on the circle.

 [Radius is the distance from the center to any point on the circle.]
2 Diameter = 2 × radius

 [Divide each side by 2.]
3 Diameter2 = radius

 [Substitute 6 for diameter.]
4 Radius = 62 = 3

5 So, the radius of the circle is 3 cm.



Hence the right answer is Option B

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