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.
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There's no such thing as a "triangle quadrilateral".The sum of the interior angles of a triangle is 180 degrees,and for a quadrilateral it's 360 degrees.
360 degrees is either a square or a quadrilateral.
360... Quad = two triangle = 2 * 180
It has 4 and they add up to 360 degrees
Because there are 180 degrees in a triangle and a 4 sided quadrilateral is made from two triangles so therefore 2*180 = 360 degrees