Question

Test din cercul gimnaziu matematica! Pana maine am nevoie de el va rog.

Answer 1

$\it 1)\ Triunghiul\ \ este\ \ pitagoreic\ \ (6.\ \ 8,\ \ 10).\ \ \ R=10:2=5\ cm\\ \\ 2)\ \ \ell=2\cdot a_4=2\cdot2=4\ cm\\ \\ \mathcal{A}_{\Box}=\ell^2=4^2=16\ cm^2\\ \\ \\ 3)\ R=\ell_6=\dfrac{40}{2}=20\ cm\\ \\ \mathcal{A}_{cerc}=\pi R^2=\pi \cdot20^2=400\pi\ cm^2\\ \\ \\ 4)\ 360^o-50^o=310^o$