Question

find x inthis figure. chapter from triangle congurency

Answer 1

hey frnd.....
we know that
<ABC = <ADC as they are opposite to the equal sides so they are also equal.

now in ∆ ACD
<CAD + <ADC = <ACB
because the outer angle is equal to the sum of interior opposite angles
20° + x = 75°
x = 55°

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