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. It has a base side, a hypotenuse and height of the triangle. We know that hypotenuse = √(Base^2 + Height^2). 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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Cos (q) =

Tan (q) =

Angle b = (90 - q)

Hypotenuse = √(Base^2 + Height^2)

The formulae (formula) for calculating angle and sides of a triangle can be easily remembered using the sentence -**O**ld **H**arry **A**nd **H**is **O**ld **A**unt.

**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