3-4-5 Triangle
Side A (opposite): 3 units; Side B (adjacent): 4 units
Angle B (opposite to side B): 53.13 degrees; Angle A (opposite to side A): 36.87 degrees; Side C (hypotenuse): 5 units
Right Triangle Calculator
Math0.0(0)
Calculates the missing sides and angles of a right-angled triangle using the Pythagorean theorem and trigonometric functions.
More tools:Math & Statistics Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Side A (opposite) and Side B (adjacent) in the units shown.
Step 2
Read Angle B (opposite to side B), Angle A (opposite to side A), and Side C (hypotenuse) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
5-12-13 Triangle
Side A (opposite): 5 units; Side B (adjacent): 12 units
Angle B (opposite to side B): 67.38 degrees; Angle A (opposite to side A): 22.62 degrees; Side C (hypotenuse): 13 units
Equilateral Triangle
Side A (opposite): 1 units; Side B (adjacent): 1 units
Angle B (opposite to side B): 45 degrees; Angle A (opposite to side A): 45 degrees; Side C (hypotenuse): 1.414213562 units
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