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PostPosted: Wed Dec 20, 2017 9:09 am 
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Joined: Mon Oct 30, 2017 7:50 am
Posts: 10
Hi,
The diagram shows two circles with a common tangent at T. The radius of the smaller circle is 5 cm and BT=BP. ACBP is a tangent to the circle with centre O. Calculate
(a) The length of TP

My attempt
- I tried to solve the question by finding complimentary angle of angle X, which is 90 degree - 32.5 degree(angle X) = 57.5 degree, and by using Trigonometry to calculate half the length of TP, Tan 57.5 degree multiply 5 cm, = 7.85 cm , and then multiply by 2, 7.85 cm x 2, the answer from me is 15.70 cm, but the correct answer is 17.15 cm.
Any suggestion?

Please help.
Thanks!
I didn't find the right solution from the Internet.
References:https://www.freemathhelp.com/forum/threads/108637-How-do-I-solve-this-Circle-Tangent-Problem

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