What is Isosceles Triangle?

An isosceles triangle has two equal sides (legs) and two equal base angles. The axis of symmetry runs from the apex (the unique vertex) to the midpoint of the base

How accurate is the Isosceles Triangle calculator?

The calculator uses the standard published formula for isosceles triangle. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Isosceles Triangle calculator use?

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Isosceles Triangle calculator use?

The core formula is: Two sides equal: a = b (legs), c = base. Each step in the calculation is shown so you can verify the result manually.

Matematik

Isosceles Triangle Calculator

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Two equal sides (a), base (b). h = √(a²−(b/2)²)

Equal sides (a)

Base (b)

Formula-verified for precision

Reviewed October 2026

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Isosceles Triangle Calculator

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