Question

Срочно!!!
Помогите!!!

Answer 1

3. $S = Pi * ON^2 - Pi * OM^2 = Pi(12^2-10^2)=44Pi$

4. $62=5/12*l=5/12*2Pi*r=5/6Pi*r\\l=62*12/5=148,8\\S=Pi*r^2=l^2/(4Pi)=1785,6$