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What is the measure of this
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What is the measure of this

What is the measure of this-example-1
User Richard Chambers
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Answer 21
Explanation: a triangles angels equals 180 in total so you would add the two angles you already know 117 plus 42 which equals 159. Then subtract from 180 which would be 21 your answer!

Hope this helps :)
User Novicegeek
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