Let's look at the geometric characteristics of an isosceles triangle. But first, please review the definition of Area Of Two-Dimensional Shapes, Angle, and Right Angle.

- An isosceles triangle has two unique features.
- The first unique feature of an isosceles triangle is two sides have exactly the same length: sides A.
- The second unique feature of an isosceles triangle
the angles at the base of the triangle are exactly the same. In other words
**∠BA**and**∠AB**are equal. The sum of the interior angles is 180°. - Special note, all sides of an isosceles triangle must be greater than zero.

**Area Of Isosceles Triangle Formula**

Formula = ½ × B × H