15.9. ,
a) C (2, 3) R = 7;
) A (3, 2) B ( 1, 6).
15.10. ,
a) a = 3, b = 2; ) a = 5, c = 4; ) c = 3, e = 3/5; ) b = 5, e = 12/13.
15.11. , Oy, . .
15.12. , Ox a) a = 2, b = 3; ) b = 4, c = 5; ) c = 3, e = 3/2;
) a = 8, e = 5/4; ) c = 10 y = x.
15.13. , Oy 10, 8.
15.14. :
) x 2 = 5 y; ) y 2 = 4 x.
15.15. , Oy, , A ( 2; 4).
15.16. y 2 = 12 x. , A (8; 0) Ox 60.