Quadrilaterals are not triangles, and there is no such thing as a quadrilateral triangle. Perhaps you mean equilateral, in which case, it has 3 equal angles and 3 equal sides; the word equilateral actually means equal sides. And quadrilateral means four sides. Triangle means 3 angles.
No but an equilateral triangle does.
isosceles
A kite or arrowhead.
sometimes
sometimes
No but an equilateral triangle does.
No but an equilateral triangle does.
A quadrilateral shape has four sides and four internal angles. A triangle has three sides and three internal angles. Therefore there is no such thing as a quadrilateral triangle.
triangle
A quadrilateral never has exactly 3 congruent angles. It can have none, two, two pairs of two, or four.
never
A parallelogram has 2 pairs of congruent angles of different sizes
No. Only sometimes. A quadrilateral can have any number of congruent angles ... none, 2, 3, or 4.
isosceles
A kite or arrowhead.
sometimes
Sometimes