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What is the measure of the missing angle?
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What is the measure of the missing angle?

What is the measure of the missing angle?-example-1
User Danwellman
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hello! every triangle’s interior angles add up to 180. here would be how I solve this equation.

180-75-40=65 (find missing angle)
65+x=180 (supplementary angles)
180-65=x (substitution)
115=x (simplify)
x=115 (reflexive property of equality)
User Wyu
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