![]() ![]() Now the hypotenuse of right angle triangle i.e.Also solve base of right angle triangle that is formed with vertical line and diagonal of quadrilateral using trigonometry formulas.Solve the vertical line using trigonometry as we know one angle and one side of triangle.Draw a perpendicular line to base from third endpoint, name it as vertical line. Denote base endpoints as first and second, the another endpoint of triangle as third.Consider the side for which a known angle is attached as base and draw diagonal opposite to known angle it forms a triangle.If given angle is less or more than 90 degrees. We are having two triangles and it is solved as in first scenario. If given angle is right angle, then using Pythagoras theorem diagonal is calculated. Quadrilateral can be divided into two triangles. Below for every input combination of irregular quadrilateral, how to calculate area is explained. This is a brief guide to calculate irregular quadrilateral area by own. ![]() The resultant Area of Irregular Quadrilateral or Irregular Rectangle is shown instantly by clicking Calculate button.Choose the Angle or Diagonal Name from drop down menu.Enter the values of sides in the Calculator as per named A,B,C,D.For example, Angle between sides B and C is named as BC, Diagonal between corners AB and CD is named as AB-CD.Also name the angle measured or known, as the sides between it is present. Name the sides in serial starting with A and end with D. ![]()
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