1. two sides must be the same length, one different
2. all sides must be straight
3. an enclosed figure (polygon)
4. all angle measurements add up to 180degrees
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A trapezoid unless it is an isosceles trapezoid
They are both 4 sided quadrilaterals but a trapezoid has different properties than an isosceles trapezoid which has 2 equal base angles.
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Properties of quadrilaterals
Yes, an isosceles trapezoid can have at least one right angle. In such a trapezoid, the non-parallel sides are equal in length, and if one of the angles between a base and a non-parallel side is a right angle, the trapezoid will still maintain its isosceles properties. This configuration results in a trapezoid that is both isosceles and contains a right angle.