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I need help with 5 pls

I need help with 5 pls-example-1
User JAHelia
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1 Answer

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All triangles have a full angle measure of 180 degrees. One of the angles is 90 degrees since this is a right triangle, so you subtract it from the total. 180 - 90 is 90. Now you know the sum of the remaining angles is 90.
User Xielingyun
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