![]() To use the calculator, enter your lengths, and the angle \( \alpha \) into the sidebar and hit calculate. Alternatively, if you need to buy some tiles or new carpet for a room, the tool will tell you how much material you need to buy. For example, if a farmer needs to distribute 100g of fertilizer per square meter of a field, they can use the calculator to calculate the area of the field. There are many cases in which it is useful to calculate the area of a quadrilateral. \( s \) is the semi perimeter, (half of the sum of all the lengths) and \( \alpha \) and \( \gamma \) are two opposite angles. The formula works for all convex quadrilaterals, which means none of the internal angles are greater than 180°. Then we can use Bretschneider's formula to calculate the area, \( K \). 322, 2003.Given 4 lengths and an angle, we can use this information to draw a quadrilateral. Given side length b and the diagonals calculate the perimeter, height, area, side length a and angles A, B, C and DĬRC Standard Mathematical Tables and Formulae, 31st Edition New York, NY: CRC Press, p.
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