MATH CALCULATOR
Triangle Side Angle Calculator
Calculate the sides and angles of a triangle using our online calculator.
What is the Triangle Side Angle Calculator & How does it work?
A triangle is a polygon with three sides and three angles. The sum of the interior angles in any triangle is always 180 degrees.
To calculate the sides and angles of a triangle, you can use various trigonometric formulas such as the Law of Sines and the Law of Cosines. For example, if you know two sides and the included angle (SAS), you can find the third side using the Law of Cosines:
To calculate the sides and angles of a triangle, you can use various trigonometric formulas such as the Law of Sines and the Law of Cosines. For example, if you know two sides and the included angle (SAS), you can find the third side using the Law of Cosines:
c^2 = a^2 + b^2 – 2ab cos(C)
c = length of side opposite angle C
a, b = lengths of the other two sides
C = included angle between sides a and b
a, b = lengths of the other two sides
C = included angle between sides a and b
Parameters
Result—
Frequently Asked Questions
How do I find the third side of a triangle if I know two sides and the included angle?
Use the Law of Cosines: c^2 = a^2 + b^2 – 2ab cos(C), where C is the included angle.
Can this calculator help me find an angle if I know all three sides?
Yes, you can use the Law of Cosines to find any angle: cos(A) = (b^2 + c^2 – a^2) / 2bc.
What is the sum of interior angles in a triangle?
The sum of the interior angles in any triangle is always 180 degrees.
How do I use the Law of Sines to find an angle?
Use the formula sin(A) / a = sin(B) / b, where A and B are angles opposite sides a and b respectively.
Can this calculator solve right triangles?
Yes, for right triangles, you can use basic trigonometric functions like sine, cosine, or tangent.
What if I only know one side and one angle of a triangle?
You would need additional information such as another side or angle to solve the triangle.
Is this calculator suitable for any type of triangle?
Yes, it can be used for acute, obtuse, and right triangles.
Results are for informational purposes only and do not constitute professional advice.