`A = 1/2* "b" * "c" *sin( alpha )`

Enter a value for all fields

The Area of a Triangle Area based on Two Sides and Angle calculator computes the area of a triangle given the length of two sides (b & c) and the inscribed angle (α).

INSTRUCTIONS: Choose units and enter the following:

• (α) Angle between Two Sides
• (b) Length of Side
• (c) Length of other Side

AREA (A):The calculator returns the area in square meters (m²).  However, this can be automatically converted to other area units (e.g. square feet) via the pull-down menu.

The Math / Science

The formula for the area of a triangle based on the length of two sides and the angle between them is:

         `A = 1/2*b*c*sin(α)`

where:

• A = Area of the triangle
• b = length of one side
• c = length of other side
• α = angle between them

Triangle Calculators

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• Area of a triangle using two sides and the interior angle.
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• Area of a triangle using three known sides.
• Area of a triangle defined by three points (x,y) in a plane.
• Height of a triangle based on the area and base
• Interior Angle of a triangle based on the length of three sides
• Semi-perimeter of a triangle
• Area between two vectors