Parallelogram

2 opposite sides are parallel and have the same length.
Side length a=
Side length b=
Height h_a=
Side length a=
Side lengthb=
Height h_a=
Circumfirence U=2(a+b)=
Area A=a*h=
Diagonal 1 d_1  = \sqrt {a^2  + b^2  + 2*a*sqrt {b^2  - h_b^2 } } =
Diagonal 2 d_2  = \sqrt {a^2  + b^2 -2*a*sqrt {b^2  - h_b^2 } } =
Angle asin(A/(a*b))=
Angle beta=pi-alpha=