This problem is very intresting, as I first got the correct answer using analytic geo, but wondered if there was another, easier way to do this.
If ΔBCD is isosceles and ㄥADC = 105° and BC = 5√6, find AC in the figure below:
https://ibb.co/1GfxMNx
If ΔBCD is isosceles and ㄥADC = 105° and BC = 5√6, find AC.
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∠ADB = 1/2 (105º) ∠ABD = 90º - ∠ADB AB = BC
AC = 2 (sin∠ABD * 5√6)
Please be careful when you are answering, ABD is not half of 105 degrees and AB≠AC.