Quadrilateral Calculator
MathFind the area and perimeter of a quadrilateral from its four sides and two opposite angles.
Area
The area found using Bretschneider formula for a general quadrilateral
Perimeter
26.0000
The total distance around the quadrilateral
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Odeh Ahwal0people find this calculator helpful
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Saved
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Frequently Asked Questions
What formula finds the area of a general quadrilateral?
Bretschneider formula finds the area of any quadrilateral from its four sides and two opposite angles, generalizing the triangle Heron formula.
What is the area of a quadrilateral with sides 5, 6, 7, 8 and opposite angles of 100 and 80 degrees?
The area is about 40.99 square units, and the perimeter is 26 units, the sum of the four sides.
What happens to Bretschneider formula when the quadrilateral is cyclic?
When the two opposite angles add up to 180 degrees, as in a cyclic quadrilateral, the formula simplifies to Brahmagupta formula for a quadrilateral inscribed in a circle.
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