About this right triangle calculator
From two legs the whole triangle follows: the hypotenuse by Pythagoras and the angles by arctangent. Legs 5 and 12 give a hypotenuse of 13, angles of 22.62° and 67.38°, an area of 30 and a perimeter of 30.
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Right Triangle Calculator
Details
How to use Right Triangle Calculator
What the tool does, how to run it, and what to expect from the result.
At a glance
Who Right Triangle Calculator is for
A quick way to understand who this helps, what it solves, and where it connects next.
Best fit
Students, teachers and anyone checking a calculation.
Ideal for
Using the right triangle calculator without installing anything or signing up.
FAQ
Common questions
Short answers for the questions people usually have before trying a utility like this.
How do I find the angles of a right triangle?
Angle A = arctan(a ÷ b), where a is the leg opposite A; the other acute angle is 90° − A.
What is the area of a right triangle?
Half the product of the legs: 5 × 12 ÷ 2 = 30.
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