Question

Find the value of x in the figure.

Answer 1

As they said DC = AC 
A is equal to x+56=180
x=180-56
x=124
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Answer 2

let angle cad and adc be y

$2y + 56 = 180 \\ 2y = 180 - 56 \\ y = 124$

now angle adb

= 180-124

= 56

now:

$x + x + 56 = 180 \\ 2x =180 - 56 \\ 2x = 124 \\ x = 124 \div 2 \\ = 62$

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