Variables

a, b
→
Sides
d
→
Diagonal
R
→
Circumscribed circle radius
P
→
Perimeter
A
→
Area
1.
Rectangle diagonal
$d=\sqrt{a^2+b^2}$
Diagonal
Rectangle
2.
Rectangle circumcircle radius
$R=\dfrac{d}{2}$
Circumcircle R
Rectangle
3.
Rectangle perimeter
$P=2a+ab$
Perimeter
Rectangle
4.
Rectangle area
$A=ab$
Area
Rectangle

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