two angles are in ratio 4:5 if the sum of these angle is equal to third angle then the third angle is what
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let the angles be 4x and 5x
sum of them = 4x+5x = 9x
=) 4x+5x+9x= 180
18x = 180
x =10
so third angle is 9x = 9*10=90
sum of them = 4x+5x = 9x
=) 4x+5x+9x= 180
18x = 180
x =10
so third angle is 9x = 9*10=90
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