AB =DC
Find 'x'
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Sum of is 180 degree
We put another two angle as x
So,
80+x+x=180
80+2x=180
2x=180-80
2x=100
x=100/2
x=50
We put another two angle as x
So,
80+x+x=180
80+2x=180
2x=180-80
2x=100
x=100/2
x=50
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