Geometry & Measurement Calculators
Isosceles Triangle Calculator
Solve an isosceles triangle from its base plus a leg or the height.
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What is Isosceles?
An isosceles triangle has two equal sides and two equal base angles. The height splits it into two congruent right triangles.
How it works
We split the triangle down the middle, use the Pythagorean relation to find the missing dimension, then compute the angles and area.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.