No. A triangle is a 3-sided figure and a quadrilateral is a 4-sided one. Are all triangles quadrilaterals? No. None of them are. no because they only have three sides
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No actually none are because quad means four and squares and rectangles and stuff like that are quadrilaterals
All kites are quadrilaterals, but quadrilaterals are not kites.
All parallelograms are quadrilaterals but all quadrilaterals are not necessarily parallelograms
Many different types of quadrilaterals can have three equal side lengths. as long as it is a closed shape that has four sides, it is considered a quadrilateral, but not all quadrilaterals have names. A triangle with three equal side length would be called an equilateral triangle.
Well, first of all triangles can't be quadrilaterals because qaud means four and tri means 3. A triangle is a polygon. A triangle can not have any less or any more than 3 sides, but not all of them have to be the same length, so therefor it can defenitally not be a quadrilateral because it only has 3 sides and it doesn't have to be equal on all of the sides.
No, trapezoids are quadrilaterals, they have 4 sides. Triangles have 3 sides.