A triangle is not a quadrilateral, but a parallelogram and trapezoid are.
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A triangle is a polygon with 3 sides whereas a quadrilateral is a polygon that has 4.
The fourth side!
Triangle, quadrilateral or hexagon. Triangle, quadrilateral or hexagon. Triangle, quadrilateral or hexagon. Triangle, quadrilateral or hexagon.
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A quadrilateral triangle is an oxymoron.A quadrilateral has four sides, a triangle has three so a quadrilateral triangle cannot exist. You could therefore say that it has zero degrees.