Task/24822865
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10. sinβ =AC/AB =AC/ √(AC² +BC²) = 8 / √(8² +15²) =8/17 → В) 8/17.
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11. x(C) =( x(M) + x(N) ) /2 =( 8+(-4)) /2 =4/2 =2 ;
y(C) =( y(M) + y(N) ) /2 =( -9+3) /2 = - 6/2 =-3
→ Г) (2 ; -3) .
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12. S =a²
C =2π*r =π*2r =π*a ⇒ a =C/π = 8π/π =8
S =a²=8² =64 (см²) → A) 64 см² .