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14-12-2017
Mathematics

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I am very confused can you please show each step? Thank you very much!

I am very confused can you please show each step Thank you very much class=

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14-12-2017

< x is 90 degrees because triangle ABC is isosceles and AD bisects < BAC.
Triangle BAD is right angled so < y = 90 - <ABD
<ABD = <ACD ( because triangle ABC is isosceles
So < ABD = 47 degrees
Finally y = 90 - 47 = 43 degrees answer

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