the angles A,B,C and D of a quadrilateral ABCD in that order are in ratio 5:7:7:11. the measure of angle C is
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let common multiple s be x
5x,7x,7x,11x
5x+7x+7x+11x =360
30x=360
x=360%30
x=12
angle c =7x=7*12=84
5x,7x,7x,11x
5x+7x+7x+11x =360
30x=360
x=360%30
x=12
angle c =7x=7*12=84
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