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
perimeter L

To improve this 'Area of a quadrilateral Calculator', please fill in questionnaire.

Male Female
Under 20 years old 20 years old level 30 years old level
40 years old level 50 years old level 60 years old level or over
Elementary school/ Junior high-school student
High-school/ University/ Grad student A homemaker An office worker / A public employee
Self-employed people An engineer A teacher / A researcher Others
Very A little Not at All
Purpose of use?
Comment/Request (Click here to report a bug).
Your feedback and comments may be posted as customer voice.