equilateral triangle i think
quadrilateral means having all sides the same length. when you make a shape with 3 obtuse angles and with the same length on the sides, only 3 of them will have the same length which is the sides of the 3 obtuse angles. then the last side will be too long. obviously it is no more quadrilateral.
It is an isosceles triangle
a triangle
angles dont have lengths, but degrees. it s an equilateral triangle ( length 3X the same, angle 3X 60°)
isosceles triangle has two sides equal in length and two angles of the same measure;
If the shape has 3 angles in all, where two of the angles are acute, then the shape is a scalene triangle.
Triangle
An isosceles triangle fits the description given or an equilateral triangle which has 3 equal sides and 3 equal acute angles.
to be congruent two triangles have, ASA-two angles the same with a side length between them. SAS-two side lengths the same and a same angle between them. SSS-all 3 side lengths the same. RHS-if the triangles are right angles ,and the hypotenuse are the same. :)
An equalateral triangle
2-D: Isosceles triangle would be my best answer. There isn't a 2-D shape with only two angles, so I'll assume your asking for the shape with two congruent angles and all other angles are different. That would be an isosceles triangle. One angle is unique, the other two are congruent. But, that isn't the only one. So long as a shape has an odd number of sides this can happen. 3-D: a cylinder only has two angles, and they're both right angles.
equilateral triangle i think
well, they could be congruent, there are some rules for congruency, to be congruent two triangles have, ASA-two angles the same with a side length between them. SAS-two side lengths the same and a same angle between them. SSS-all 3 side lengths the same. RHS-if the triangles are right angles ,and the hypotenuse are the same. ;or they could be mathmatically similar. :)
A isosceles triangle
quadrilateral means having all sides the same length. when you make a shape with 3 obtuse angles and with the same length on the sides, only 3 of them will have the same length which is the sides of the 3 obtuse angles. then the last side will be too long. obviously it is no more quadrilateral.
It is an isosceles triangle