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.
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In a quadrilateral the sum of all four angles equals 360º.
This result follows from the theorem that the sum of the angles of a triangle is 180 degrees. Drawing a diagonal in the quadrilateral splits it into two triangles and the angles of the triangles together combine to form the angles of the quadrilateral.
It is a convex quadrilateral, as the remaining angles could be any two angles with a sum of 180 degrees.
The sum of all of the angles of a triangle will ALWAYS be 180 degrees.
The sum of all the angles in a quadrilateral always add up to 360 degrees. Hope that helps!!!!