Calculating the area of a triangle online

Our online calculator allows you calculate the area of a triangle in five different ways: through its sides, angles, height, radius of the inscribed or circumscribed circle. To find the area of a triangle, choose the appropriate method, enter the required values in the input fields and click “To calculate”, the calculator will give an answer and the detailed solution!

Enter the data for calculating the area

Select the method of calculating the area:

The formula through the base and height:

a = b =

To calculate the area

Enter the numbers and press the button «To calculate the area», after that there will appear the detailed solution!

Solution	S= 1 2 a · h = 1 2 · = 25 S= 1 2 a · h · sin ( α ) = 1 2 · · sin ( ) = 25 The half-perimeter of a triangle: p= a + b + c 2 = + + 2 = 25 The area of a triangle: S = p · (p - a) · (p - b) · (p - c) = · ( - ) · ( - ) · ( - ) = 25 The half-perimeter of a triangleа: p= a + b + c 2 = + + 2 = 25 The area of a triangle: S = p · r = · = 25 S= a · b · c 4R = · · 4 · = 25

Answer	S = 25

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