Aprēķins: U13ZUp - 1
S =
π
* R^2
π
* R^2|
|
S = π* R^2$$S$$ = $$\pi\cdot R^{2}$$
* R^2$$S$$ = $$\pi\cdot R^{2}$$S = R^2* π$$S$$ = $$R^{2}\cdot \pi$$
$$S$$ = $$R^{2}\cdot \pi$$S = 20^2* π$$S$$ = $$20^{2}\cdot \pi$$
$$S$$ = $$20^{2}\cdot \pi$$S = 400* π$$S$$ = $$400\cdot \pi$$
$$S$$ = $$400\cdot \pi$$