The ratio of interior angles of a triangle is 5 : 6 and their opposite exterior angle is 110. What is the measure of each interior angle?
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let ratio be x
5x:6x
5x +6x= 110
11x =110
x=110/11
x=10
put the value of x10 in 5:6
5x= 5×10
=50
6x=6×10
=60
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