Расчет: M45NrK - 1
R =
a* saknis( 3) |
| / 3 |
|
|
R =
$$R$$ = $$\frac{a\cdot \sqrt {3}}{3}$$
| a* saknis(3) |
| / 3 |
R =
$$R$$ = $$\frac{a\cdot 1.73205}{3}$$
| a* 1.73205 |
| / 3 |
R = 0.57735* a$$R$$ = $$0.57735\cdot a$$