Side of a square: \(a\)
Diagonal of a square: \(d\)
Radius of the circumscribed circle: \(R\)
Radius of the inscribed circle: \(r\)
Diagonal of a square: \(d\)
Radius of the circumscribed circle: \(R\)
Radius of the inscribed circle: \(r\)
Perimeter: \(P\)
Area: \(S\)
Area: \(S\)
- A square is a regular quadrilateral. It has four equal sides and four equal angles (\(90^\circ\) angles).
- Diagonal of a square
\(d = a\sqrt 2\) - Radius of the circumscribed circle
\(R = d/2 =\) \(a\sqrt 2/2\) - Radius of the inscribed circle
\(r = a/2\) - Perimeter of a square
\(P = 4a\) - Area of a square
\(S = {a^2} = {\large\frac{{{d^2}}}{2}\normalsize} =\) \( 2{R^2} = 4{r^2}\)
