Розрахунок: w409AR - 1
S =
* R^2* n* sin(
)
| 1 |
| / 2 |
| 360 |
| / n |
|
S =
* R^2* n* sin(
)$$S$$ = $$\frac{1}{2}\cdot R^{2}\cdot n\cdot sin(\frac{360}{n})$$
| 1 |
| / 2 |
| 360 |
| / n |
S = 4* R^2* cos(
)* cos(
)* cos(
)* n* sin(
)$$S$$ = $$4\cdot R^{2}\cdot cos(\frac{180}{n})\cdot cos(\frac{45}{n})\cdot cos(\frac{90}{n})\cdot n\cdot sin(\frac{45}{n})$$
| 180 |
| / n |
| 45 |
| / n |
| 90 |
| / n |
| 45 |
| / n |