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] /365  DispNum  
[1] 2020/01/10 06:56 Male / 40 years old level / Highschool/ University/ Grad student / Very /
 Purpose of use
 Finding area of land plot
[2] 2019/12/15 23:27 Male / 30 years old level / Selfemployed people / Very /
 Purpose of use
 Find the area of a plot
[3] 2019/12/01 21:36 Male / 40 years old level / Selfemployed people / Very /
 Purpose of use
 To find area of the plot
[4] 2019/11/20 07:49 Male / Under 20 years old / Elementary school/ Junior highschool student / A little /
 Purpose of use
 To help me get the answer to my math homework.
[5] 2019/11/11 19:40 Male / 60 years old level or over / A retired person / Very /
 Purpose of use
 to find the total sqft of a plot of irregular size
[6] 2019/10/26 13:43 Male / Under 20 years old / Highschool/ University/ Grad student / Very /
 Purpose of use
 Completing late school assignments for geometry.
[7] 2019/10/14 16:37 Male / 20 years old level / An office worker / A public employee / Useful /
 Purpose of use
 OFFICE WORK
[8] 2019/10/08 05:29 Female / 20 years old level / An office worker / A public employee / Very /
 Purpose of use
 Finding lot area to show compliance with flood and zoning ordinances.
[9] 2019/10/07 08:17 Male / 40 years old level / An engineer / Very /
 Purpose of use
 Calculate square footage of flooring for greenhouse to maximize solar radiation storage.
[10] 2019/10/02 05:21 Male / 60 years old level or over / A retired person / Very /
 Purpose of use
 To measure the size of a plot of land to determine the quantity of grass seed required for a lawn.
Thank you for your questionnaire.
Sending completion
To improve this 'Area of a quadrilateral Calculator', please fill in questionnaire.
 The hyperlink to [Area of a quadrilateral]