1. What is an Angle of Triangle Calculator?

Definition: This calculator determines the third angle of a triangle when two angles are known.

Purpose: It helps students, engineers, and designers quickly find missing angles in triangular shapes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C \) — Third angle (degrees)
• \( A \) — First known angle (degrees)
• \( B \) — Second known angle (degrees)

Explanation: The sum of angles in any triangle always equals 180°, so the third angle is calculated by subtracting the known angles from 180°.

3. Importance of Angle Calculation

Details: Proper angle calculation is essential for geometry problems, construction projects, and mechanical design where triangular shapes are involved.

4. Using the Calculator

Tips: Enter any two angles between 0° and 179.9° (their sum must be less than 180°). The calculator will determine the third angle.

5. Frequently Asked Questions (FAQ)

Q1: What if I only know one angle?
A: You need at least two angles (or sides) to determine the third angle in a triangle.

Q2: Can I use this for right triangles?
A: Yes, if you know one non-right angle (90° is automatically the second angle in right triangles).

Q3: What if my angles sum to 180° or more?
A: The calculator will show no result as this would violate triangle angle sum rules.

Q4: How precise are the results?
A: Results are shown to one decimal place (0.1° precision).

Q5: Can I calculate angles from sides?
A: This version requires angle inputs. For side-based calculations, use the Law of Cosines.