# What is the name of a triangle with three equal sides?

**Equilateral**

### What is the name of a triangle that has 2 equal sides and 2 equal angels and the third angle obtuse?

### Is an isosceles triangle equilateral?

No. But I suppose an equilateral triangle is isosceles. An equilateral triangle is one with three equal sides. The requirements are less stringent for an isosceles triangle. All it needs is two equal sides and it's entitled to take the name 'isosceles', but if the third side isn't also equal to those two, then it can't join the 'equilateral' club.

### What is the name of a four sided triangles name?

A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist! A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist! A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist! A triangle, by definition, can have only three sides. So a four sided triangle simply cannot exist!

### Can you name 3 different triangles with showing the picture?

Three triangles are: scalene, which has three sides of different lengths, isosceles, which has two sides with the same length, and equilateral, which has three sides that are all the same length. In the picture, the scalene triangle is triangle RST, the isosceles triangle is triangle XYZ, and the equilateral triangle is triangle ABC. If two sides or more sides of a triangle have a little line on them, then they are the same length…