Triangle Calculator
Calculate triangle properties including area, perimeter, angles, and special measurements
Triangle Calculator
Choose your input method and enter the known values
Basic Properties
Triangle Type:
직각삼각형
Area:6.0000 sq units
Perimeter:12.0000 units
Semiperimeter:6.0000 units
Advanced Properties
Incircle Radius:1.0000 units
Circumcircle Radius:2.5000 units
Heights:
To side A:4.0000 units
To side B:3.0000 units
To side C:2.4000 units
Formulas Used
Area Calculations
Heron's Formula:
Area = √(s(s-a)(s-b)(s-c))
where s = (a+b+c)/2
Base × Height:
Area = (1/2) × base × height
Special Properties
Incircle Radius:
r = Area / s
Circumcircle Radius:
R = (abc) / (4 × Area)
Common Examples
Right Triangle (3-4-5)
Sides: 3, 4, 5
Area: 6 sq units
Perimeter: 12 units
Type: Right triangle
Equilateral Triangle
Sides: 5, 5, 5
Area: ≈ 10.83 sq units
Perimeter: 15 units
Type: Acute triangle
Isosceles Triangle
Sides: 5, 5, 6
Area: 12 sq units
Perimeter: 16 units
Type: Acute triangle
Related Tools
Discover other useful tools that work well with your current tool
Percentage Calculator
Calculate percentages, percentage increase/decrease, and percentage of numbers
Popular
Date Calculator
Calculate date differences, add/subtract days, and perform date arithmetic
Popular
BMI Calculator
Calculate Body Mass Index and get health recommendations based on BMI categories