The radius of oB is 4 centimeters and the circumference of oA is 20pie centimeters. Find CD.

Mathematics
Tutor: None Selected Time limit: 1 Day

Apr 21st, 2015

1.The longest Cord in a circle is called Diameter

2.Circumference(C) is given by

C=πD
Circle A
πD=20π cm
Therefore the diameter D for Circle A is 20cm
The radius for circle A is 4cm therefore its Diameter is 2*4=8cm
CD=28cm


Apr 21st, 2015

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