# Why isn't this a right angle?

Hi, I just recently started learning about quadrilaterals and right angles. I am confused about why this shape (from the 3rd grade Quadrilaterals course) does not classify as having right angles.

In the quiz, it classifies as a Quadrilateral (because of it's 4 sides), and a Rhombus (because all the sides are equal length). But the quiz says it is not a Rectangle because it's angles are not right angles.

The corners are perfectly square, aren't they? I can draw a little square in each of the four corners. What is it that classifies them as not being right angles or "square corners"? The hint didn't explain, so I am hoping someone here can explain it to me. :) Thank you!

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