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Radii, Chord, Diameter and Circumference of the Circle

The diameters...

Question

The diameters of circles are given below. Find their radii.

(1) 8 cm

(2) 6 cm

(3) 8.6 cm

(4) 5.4 cm

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Solution

(1) r =

=

= 4 cm

(2) r =

=

= 3 cm

(3) r =

=

= 4.3 cm

(4) r =

=

= 2.7 cm

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