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Triangle Area Calculator
Calculate area of triangles using various methods
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Math & Geometry ✅ Free to Use
Triangle Area Calculator
Calculate triangle area using different methods: base and height, three sides (Heron's formula), two sides with angle, or coordinates. )
40.000
Area (units²)
Unknown
Triangle Type
Triangle Properties
Area: 40.000000 units²
Triangle Type: Unknown
Method Used: Base and Height
Base: 10.000 units
Height: 8.000 units
Formula: A = ½ × base × height
Triangle Area Formulas
Base and Height
A = ½ × base × height
Heron's Formula
A = √[s(s-a)(s-b)(s-c)]
where s = (a+b+c)/2
Two Sides and Angle
A = ½ × a × b × sin(C)
Coordinates
A = ½|x₁(y₂-y₃) + x₂(y₃-y₁) + x₃(y₁-y₂)|
Triangle Types
By Sides:
Equilateral: All sides equal
Isosceles: Two sides equal
Scalene: All sides different
By Angles:
Right: One 90° angle
Acute: All angles < 90°
Obtuse: One angle > 90°