Right Triangle Calculator
English

A right triangle is a geometrical shape in which one of its angle is exactly 90 degrees and hence it is named as right angled triangle. This right triangle calculator helps you to calculate angle and sides of a triangle with the other known values. You can select the angle and side you need to calculate and enter the other needed values.

Right Angled Triangle Calculator

I want to calculate &
Opposite Side
Hypotenuse Side
Adjacent Side
Angle q
Angle b = (90-q)

A right triangle is a geometrical shape in which one of its angle is exactly 90 degrees and hence it is named as right angled triangle. This right triangle calculator helps you to calculate angle and sides of a triangle with the other known values. You can select the angle and side you need to calculate and enter the other needed values.

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Right Angle Triangle Angles Formula : Sin (q) = Old/Harry = Opposite/Hypotenuse
Cos (q) = And/His = Adjacent/Hypotenuse
Tan (q) = Old/Aunt = Opposite/Adjacent
Angle b = (90 - q)
Hypotenuse = √(Base^2 + Height^2)

Here is the online right triangle calculator for you to calculate any two parameters of the right angled triangle given the values for the remaining two known parameters. All the four parameters being angle, opposite side, adjacent side and hypotenuse side. A right triangle is a geometrical shape in which one of its angle is exactly 90 degrees. In the below online right triangle calculator, just select two parameters which you need to find, and submit to calculate angle and sides of a triangle. For side calculation, this right angled triangle calculator can accept only the angle equal to or below 90 degrees.

The formulae (formula) for calculating angle and sides of a triangle can be easily remembered using the sentence -Old Harry And His Old Aunt.

Example

A right triangle with 5 cm as base and 10 cm as height, will have an hypotenuse value of

    = √(5^2 + 10^2)
    = √(25 + 100)
    = √(125)
    = 11.18 cm

Substituting the hypotenuse and opposite side values in the Sin q formula, we have
Sin q = 10 / 11.18
    = 63.43 degrees

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