Question

in the average of the measures of two angles of a quadrilateral is 60°, what is the average of the measures of the other two angles

Answer 1

2 angles =65°

we know that sum of all angles is 360°

in this question we are given 2 angles and rest to are equal... so according to the rule that sum of all angles of a quadrilateral is 360°

let the measure of equal angles be x

then.. A.T.Q

X+X + 60 +60° = 360°

2x + 120°= 360°

2x= 360°-120°

X= 240/2

X= 120

so, the measure of equal angles is 120

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