10. On a plane, a circle divides the plane into 2 parts, a circle and a line can divide the plane into at most 4 parts, a circle and 2 lines can divide the plane into at most 8 parts. A circle and 5 lines can divide the plane into $\qquad$ parts.
【Analysis】First handle 5 lines, 5 lines can divide the plane into at most $1+1+2+3+4+5=16$ parts. Then consider one circle, one circle can intersect with 5 lines at most at 10 points, this circle is divided into 10 segments, and each segment can divide one original part into 2 parts, thus adding at most 10 new parts. Therefore, 1 circle and 5 lines can divide the plane into at most 26 parts.