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I need help finding the missing angle measurement ​

I need help finding the missing angle measurement ​-example-1
User Tyquan
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1 Answer

8 votes
You can see the triangle must be isosceles as two of the lines are the same length.
This means the two missing angles are the same.
Angles in a triangle add to 180 so 180-90 ( the right angle) = 90.
We divide this by 2 to get one angle which is 45 degrees
User Lanell
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