document.write( "Question 348187: I have been trying to help my fourth grade grandson he needs to make a quadrangle with only one right angle. draw in the right angle symbol and how do we know it is a right angle please help \n" ); document.write( "

Algebra.Com's Answer #248962 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
It's a right angle if it's 90 degrees, or square.
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