Right Triangle Calculator
Solve the remaining sides and angles of a right triangle from two sides or one side and an angle.
Input Data
對角 A 的直角邊。
對角 B 的直角邊。
斜邊。
對邊為 a 的銳角。
Results
3
4
5
36.87
53.13
Solved right triangle (A=36.87°)
At a glance:In a right triangle, the hypotenuse c and legs a, b satisfy c² = a² + b² (Pythagoras). Angle A is opposite side a, so sin A = a/c, cos A = b/c, tan A = a/b; the two acute angles sum to 90°.
Formula
c² = a² + b².
sin A = a/c, cos A = b/c, tan A = a/b.
A + B = 90°.
How to Use
- Enter two of the three sides, or one side plus angle A.
- Read the remaining sides and angles.
FAQ
What must I enter?
Two sides (e.g. a,b to get c; or a,c to get b), or one side plus angle A solves everything.
Degrees or radians?
This tool uses degrees: 30°, 45°, 60°.
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References
Content review: Calculatorism Science Team. Results are for reference only.