Isosceles triangles are triangles in which two of the three sides have different lengths.
isosceles * * * * * WRONG! Isosceles refers to equal lengths, and the adjective is usually employed for triangles. Triangels, which have three sides, are not quadrilaterals, which have four. The correct answer is a trapezium.
Geometry.
2 triangels
3
Yes. They originate from Hell.
No. Triangles are the strongest structure.
4
congruent right triangels
no
Yes, it has to in order to be a triangle.
It depends on isosceles WHAT? There are isosceles triangles, isosceles trapezia, for example.
No because only right angle triangles have 2 acute angles