Triangle Calculator
Calculate the area, perimeter and angles of a triangle.
Formulas:
- • Area = ½ × base × height
- • Perimeter = base + side A + side B
- • Heron's formula: √(s(s−a)(s−b)(s−c))
What is Triangle Calculator?
A triangle calculator solves for missing sides, angles, area, and perimeter of a triangle from the values you provide.
It applies the Pythagorean theorem, trigonometry, and Heron's formula.
How does the Triangle Calculator work?
Depending on the inputs (sides, angles, or base-height), the calculator applies the matching formula.
It also classifies the triangle (right, isosceles, equilateral, scalene).
How to use the Triangle Calculator?
- Enter the known sides and/or angles.
- The calculator shows the missing values, area, and perimeter.
Example
Example calculation
- Enter 10 as the base.
- Enter 6 as the height.
- The results update instantly.
Benefits of using the Triangle Calculator
- Solve geometry problems quickly.
- Check construction measurements.
- Learn triangle properties.
Who should use the Triangle Calculator?
- People tracking their weight, fitness, and daily health numbers.
- Fitness enthusiasts planning workouts, calories, and protein intake.
- Parents monitoring their child's growth and development.
- Anyone preparing for a health check-up or fitness goal.
Tips for getting the most out of the Triangle Calculator
- Use your most recent measurements for the most accurate result.
- Re-check periodically as your weight, age, or activity level changes.
- Treat the result as a guideline, not a medical diagnosis — consult a professional for health decisions.
Frequently Asked Questions
What is Heron's formula?
It computes the area of any triangle from its three sides: √(s(s–a)(s–b)(s–c)), where s is the semi-perimeter.
When is the Pythagorean theorem used?
For right triangles: a² + b² = c², where c is the hypotenuse.
Small daily decisions add up. Use the Triangle Calculator to track your numbers and make healthier choices with confidence — no guesswork, just a clear reading of where you stand.
Related Calculators
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Right Triangle Calculator
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Area Of A Triangle Calculator
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Area Of Equilateral Triangle Calculator
Calculate the area of an equilateral triangle from its side.
Isosceles Triangle Calculator
Calculate the area and height of an isosceles triangle.
Oblique Triangle Calculator
Calculate the area of an oblique triangle from two sides and included angle.