Area of a quadrilateral Calculator

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

Area of a quadrilateral
side a
side b
side c
side d
sum of angles θ12

area S
    1.  
perimeter L
    1.  
    Area of a quadrilateral
    [1-10] /403Disp-Num
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    [1]  2021/07/06 23:11   30 years old level / Others / Very /
    Purpose of use
    Thank you! I was considering buying a farm with some recently severed off land. Thanks to your calculator, I was able to ascertain that they had severed off the beautiful hay field that fronted on the road and that featured prominently in the listing. I would've wound up with one of those properties with very narrow frontage - having paid for one with full frontage, as reflected in the price and listing. Here's to you and to math!
    [2]  2021/07/02 08:14   30 years old level / Others / A little /
    Purpose of use
    Calculating diagonals of quadrilateral shade cloth
    [3]  2021/06/18 02:10   Under 20 years old / Elementary school/ Junior high-school student / Not at All /
    Purpose of use
    I've been trying to figure out this problem for 3 hours
    [4]  2021/05/22 15:55   30 years old level / Self-employed people / Useful /
    Purpose of use
    calculating square footage of garden bed
    [5]  2021/05/19 02:30   20 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    to find area of land .nice service.
    [6]  2021/05/10 09:56   Under 20 years old / High-school/ University/ Grad student / Useful /
    Purpose of use
    fact checking an assignment for geometry
    [7]  2021/04/16 04:23   30 years old level / An office worker / A public employee / Very /
    Purpose of use
    Verify square footage of a lot I am looking to build a house on.
    Comment/Request
    Very helpful, thank you!
    [8]  2021/03/27 05:21   50 years old level / Self-employed people / Very /
    Purpose of use
    Find the area of a wedge shaped lot for my real estate business.
    Comment/Request
    Great asset to have online. Will likely use again. Thanks for making this available.
    [9]  2021/03/23 22:10   40 years old level / An office worker / A public employee / Very /
    Purpose of use
    Measure area in yard where I want to put pavers
    [10]  2021/02/12 08:19   40 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    Finding the most all-purpose formula for use in a spreadsheet. This is a great resource!

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