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Math
Geometry
Polygons and Quadrilaterals
Quadrilaterals: Isosceles Trapezoids
Proving a Quadrilateral Is an Isosceles Trapezoid

Practice problem

Proving a Quadrilateral Is an Isosceles Trapezoid

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Joshua Siktar
Victor Wang

Is a parallelogram always an isosceles trapezoid? Why or why not?

Choose one answer

Option A: A

Yes because it has two pairs of parallel sides

Option B: B

Yes because its opposite angles are congruent

Option C: C

No because it doesn't have a congruent pair of adjacent angles

Option D: D

No because it doesn't have a right angle

Option E: E

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