# A regular pentagon has sides of 10cm

###### Question:

A regular pentagon has sides of 10cm.
Find the radius the largest circle which can be drawn inside the pentagon.
Actually this question is from the chapter of Triginometry: Tangent ratios
Please tell me that how could I use tangent in this particular question.
I request you to solve my question as soon as possible. I would be highly glad. Thankyou very much indeed.

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