Two circles of radius 5 and 8cm touch each other externally.

Calculate the length of the common tangent?

asked Dec 5, 2014 in PRECALCULUS by anonymous
reshown Dec 5, 2014 by yamin_math

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1 Answer

first circle radius a = 5 cm

Second circle radius b = 8 cm

The Circles touch each other externally as shown in figure.

Length of common tangent AB can be found using the formula 2√(ab)

Solution :

answered Dec 5, 2014 by Shalom Scholar
edited Dec 5, 2014 by moderator

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