Explain why a rectangle is a convex quadrilateral

The rectangle is a convex quadrilateral because of the two diagonals which lie in the interior of the rectangle. A convex quadrilateral is a four-sided polygon that has an interior angle that measures less than 180degree each. Rectangle has 4 sides are they are parallel to each other. Each angle is 90 degree. If we join the opposite corners then the diagonals will lie in the interior and all the angles will be less than 180 degree

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