Input Values
Result
Enter base and equal side length, then click Calculate.
About Isosceles Triangles
An isosceles triangle has two equal sides and two equal angles opposite those sides.
- Height: h = √(s² - (b/2)²)
- Area: A = (base × height) / 2
- Perimeter: P = 2s + base
Where s is the length of equal sides and b is the base.