Math Calculators

Right Triangle Calculator

Calculate the hypotenuse and area of a right triangle. The estimate updates in your browser as you type.

Hypotenuse 5 units

Area: 6 sq units. Perimeter: 12.

What this tool is for

Right Triangle Calculator supports math checking in math calculators by showing how apply the formula shown on this page to the entered values. The page keeps the inputs, formula, and example together so the calculation can be checked before the number is reused.

When to use it

Use it when side a and side b are already known and you need a quick estimate before comparing options, checking a worksheet, or copying the result into another workflow.

Inputs

  • Side A is one of the direct inputs used to calculate right triangle.
  • Side B is one of the direct inputs used to calculate right triangle.

Formula

c = sqrt(a^2 + b^2)

Example

Sides 3 and 4 give hypotenuse 5.

What the result means

The result labeled "Right Triangle" is the direct output of c = sqrt(a^2 + b^2). In the worked example, sides 3 and 4 give hypotenuse 5.

Before you rely on the result

Check the inputs and formula before using the result in homework, engineering, finance, or scientific work.

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Frequently asked questions

What does Right Triangle Calculator calculate?

Right Triangle Calculator uses c = sqrt(a^2 + b^2) to calculate right triangle from side a and side b.

Can I use this result as a final decision?

Right Triangle Calculator is meant for fast planning math. Confirm taxes, contracts, school rules, medical guidance, building codes, or financial advice with the right source when the result affects a real decision.