None.
Mathematically impossible..
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A rhombus has four sides, a triangle has three.A rhombus has four sides, a triangle has three.A rhombus has four sides, a triangle has three.A rhombus has four sides, a triangle has three.
A polygon is any contained shape made up of any number of straight lines. A quadrilateral is any polygon which has four sides. So we want a shape made of straight lines which doesn't have four sides. One example of this would be a triangle. Another example would be a pentagon. Another still would be a hexagon.
No. A triangle is a polygon and that has three sides. A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons.
No because a quadrilateral has 4 sides whereas a triangle has 3 sides.
If a figure has four sides, then it is a quadrilateral; it cannot be a triangle.