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QUESTION

It is about a isosceles

Let ABC a isosceles where AB=AC and angle A is 100degree. The bisector of angleACB meets AB at D. If, BC is equal to 2017. Find AD+CD.

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Robert
Robert
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ANSWER

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***** ***** ABC = angle *** * * ********* *******

* *** 2b = ** * * ** bisecting angle *** * 20 ***** ***** *** * ** and Angle ADC

= 180 - ******** * ** Let ** =

* = ** since ** ** isosceles ******** cosine rule

****** = *** +a^2

-2a^2 *** *** ****** * 2a^2 -2a^cos ***

2017^2 * 2a^2 *** *** *****

** ******* **** * * **********

*********** ******** *** ******** *** **** *****

*** ** /a = *** 100 ****

** * * *** ******* ** substituting

*** a CD * 149707226 similarly ***** ** =

*** ** **** ** =

* *** ** **** *** AD

= ********** ***** * ********* * ***********

**** ** * **

* **** * Rounded **

* ***** *******

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