# Are all isosceles triangles acute?

##### 1 Answer

May 27, 2018

No. There can be an obtuse angle or a right-angle in an isosceles triangle.

#### Explanation:

No. You can three types of isosceles triangles:

**acute-angled isosceles triangle**

All the angles are acute and the base angles are equal.

eg:

**right-angled isosceles triangle**

One angle is

**obtuse-angles isosceles triangle**

One angle is obtuse and the base angles are equal.

eg:

Of course there can only be one