A quadrilateral triangle has three equal sides.
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.
An equilateral triangle has 3 congruent sides
It is an equilateral triangle that has 3 congruent sides
How about an isosceles triangle of which 2 of its 3 sides are congruent and 2 of its 3 angles are congruent
It cannot. There is no way to draw a quadrilateral where 3 sides are congruent.
Yes.
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.
A quadrilateral triangle has three equal sides.
A quadrilateral never has exactly 3 congruent angles. It can have none, two, two pairs of two, or four.
A quadrilateral is ANY closed figure with 4 sides. Therefore, it also has 4 angles - any of which may, or may not, be congruent. About the only general statement about angles that applies to all quadrilaterals is that the sum of the angles is 360 degrees. By the way, it is possible for a quadrilateral to have 3 congruent angles, and the fourth angle not be congruent with the other 3.
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. Only sometimes. A quadrilateral can have any number of congruent angles ... none, 2, 3, or 4.
Not sure what a "quadrilaters" is. A quadrilateral is a plane (2-dimensional) figure with four straight sides. It can have all four angles different. It can have two congruent angles (kite), 3 congruent angles (no specific name), 2 pair of two congruent angles (parallelogram/rhombus), or four congruent angles (rectangle/square).
An equilateral triangle has 3 congruent sides
It is an equilateral triangle that has 3 congruent sides
triangle