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Question

One angle of a triangle is 40 and the other two angles have equal measures. Measure of each equal angle will be degree.

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Solution

Let's name the vertices of triangle as A, B and C.
mA=40mB=mC

mA+mB+mC=180mB+mC=180(mA)
mB=mC
2(mB)=18040
mB=180402=1402=70mC=70

Hence, the measure of the other two equal angles will be 70


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