Quadrilaterals
They all belong to the class of 4 sided polgons known as quadrilaterals.
no, since the bases are circles.
All isosceles triangles are not equilateral triangles
Yes all equilateral triangles are acute triangles, but not all acute triangle are equilateral triangles.
No. But all isosceles triangles and equilateral triangles are.
All isosceles triangles are not equilateral triangles
Yes. But not all isosceles triangles are equilateral.
What is the names of all the triangles?
polygons are 2d(square), poly hedrons are 3d(cube)
no
No. Only right triangles do, and not all triangles can be right triangles. Equilateral triangles, for example, are always 60°-60°-60°. Isosceles and scalene triangles can be right triangles; all isosceles triangles have the additional useful property of being able to be split into two right triangles.