Area of a quadrilateral Calculator
Calculates the area and perimeter of a quadrilateral given four sides and two opposite angles. 


\(\normalsize Bretschneider's\ formula \\ (1)\ area:\ S=\sqrt{(s{\small}a)(s{\small}b)(s{\small}c)(s{\small}d){\small}abcd\cos^{\small2}\frac{\theta}{2}}\\ \hspace{100px} s={\large\frac{a+b+c+d}{2}}\ ,\hspace{10px} \theta=\theta_1+\theta_2\\ (2)\ perimeter:\ L=2s=a+b+c+d\) 

Area of a quadrilateral
[110] /385  DispNum  
[1] 2020/10/23 22:32 Male / 20 years old level / An office worker / A public employee / Very /
 Purpose of use
 Area for Building, constructing panels
[2] 2020/09/17 11:20 Female / 20 years old level / An office worker / A public employee / Very /
 Purpose of use
 Calculating area of land lots  real estate marketing
[3] 2020/09/06 18:21 Male / 20 years old level / Others / Useful /
 Purpose of use
 To memorize
 Comment/Request
 How to calculate area of four sides which are 50ft,59ft,65ft,71ft without knowing (base & height,angles)....
[4] 2020/09/04 07:02 Male / 20 years old level / Highschool/ University/ Grad student / Useful /
 Purpose of use
 Civil engineering project during undergraduate degree
[5] 2020/08/31 12:03 Male / 60 years old level or over / A retired person / Useful /
 Purpose of use
 I need to divide a piece of land into 5, each with the same area.
 Comment/Request
 I need to be able to get the distances along the edges if the area and angles are known
[6] 2020/08/23 02:18 Male / Under 20 years old / Highschool/ University/ Grad student / Useful /
 Purpose of use
 Find out how many hectares a forest area is.
[7] 2020/08/17 04:12 Male / 40 years old level / Highschool/ University/ Grad student / Very /
 Purpose of use
 AREA IN SQUARE METER
 Comment/Request
 20.8*21.860.6*59.6 AREA IN AQUARE METER I NEED HOW MANY ARES ALSO
[8] 2020/08/03 21:05 Male / 50 years old level / An office worker / A public employee / Very /
 Purpose of use
 calculate land area
 Comment/Request
 how to find internal angles of an irregular quadrilateral?
[9] 2020/06/28 01:16 Female / Under 20 years old / Elementary school/ Junior highschool student / Very /
 Purpose of use
 It helped me a lot
[10] 2020/06/09 23:16  /  /  /  /
 Comment/Request
 if both angles sum not given then how the area of the quadrilateral will colaculate.Mean only all four sides are given
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