Geometry Tool
Isosceles Triangles Calculator
Solve for area, height, and angles of a triangle with two equal sides.
Area
60.000
Height
12.000
Perimeter
36.000
Angles
67.4°
Base Angles (x2)
45.2°
Vertex Angle
Σ The Formula
h = √(a² - (b/2)²)
Real World Examples
Standard Case
Base = 10, Legs = 13. Results in Height = 12 and Area = 60.
Architecture
Used in roof truss and gable design for symmetrical structures.
# About This Calculator
An Isosceles Triangle is a triangle that has at least two sides of equal length. The two equal sides are called the 'legs' and the third side is the 'base'.
Because of its symmetry, the altitude (height) drawn from the vertex to the base bisects both the vertical angle and the base, creating two identical right-angled triangles.
How To Use
- Enter the **Base** length (third side).
- Enter the **Leg** length (the length of the two equal sides).
- The leg length must be greater than half the base length (a > b/2).
- Instantly see the **Height**, **Area**, and **Angles**.
Frequently Asked Questions
Is Isosceles Triangles Calculator free to use?+
Yes, Isosceles Triangles Calculator on Matheric is completely free to use. We believe in accessible education and utility for everyone.
How accurate is Isosceles Triangles Calculator?+
We use standard mathematical formulas and high-precision computing algorithms to ensure results for Isosceles Triangles Calculator are accurate for academic and professional use.
Can I use Isosceles Triangles Calculator on my phone?+
Yes! Isosceles Triangles Calculator is fully responsive and optimized for all devices, including smartphones, tablets, and desktops.
Do you save my data?+
No. We prioritize your privacy. All calculations are performed in your browser or temporarily processed, and we do not store your personal input data.
How do I report a bug?+
If you notice any issues with Isosceles Triangles Calculator or have suggestions for improvement, please contact us via the link in the footer. We value your feedback!
Can I request a new feature?+
Absolutely. We are constantly expanding our toolset. Feel free to reach out with your requests, and we might build it next!
About
An Isosceles Triangle is a triangle that has at least two sides of equal length. The two equal sides are called the 'legs' and the third side is the 'base'.
Because of its symmetry, the altitude (height) drawn from the vertex to the base bisects both the vertical angle and the base, creating two identical right-angled triangles.