Square
Square and basic formulas for calculating circle. Practically, simply,concisely and graphically.
Notions
- Square is areal planar shape.
- Diagonal is a line which connects opposite corners of square.
Terminology
- a… side of square
- u… diagonal of square
- O… perimeter of square
- P… area of square
Formulas for calculating
Basic formulas
- Perimeter: O = 4 × a
- Area: P = a × a = a2
- Diagonal: u = a × √2 ≈ a × 1,41
Derived formulas
- Side from overall perimeter a = O/4
- Side from lenght of diagonal a = u / √2
- Side from area of square a = √P
- Diagonal from area of square u = √P × √2
- Perimeter from area of square O = 4 × √P
- Area from perimeter of square P = O2 / 16
- Area from lenght of diagonal P = u2 / 2
Circle
-
Diametr of inscribed circle is equal to lenght of the side of square:
- Inscribed circle: d = a
- Circumscribed circle: D = u
Diametr of circumscribed circle is equal
Practical calculation
Work in progress
Links
References
Related topics
Mathematics a geometry
* [[Pí]]
* [[Čtverec]]
* [[Válec]]
* [[Koule]]
Literature
Internet Links
* [http://kruh.wikina.cz/ Obvod kruhu, obsah kruhu] – výpočet online
[[Kategorie:Matematika]]
Categories: Uncategorized