Solution

35462

First name
Lizzie and Anne-Marie
School
St.Anne's C.E Primary
Country
Age
10

Our Calculation:

1 point= 9 lines
10 points= 9x10 lines= 90 lines/2= 45 lines

At the end when one point sends one line, the other point can't send that same line back so we had to divide it by 2.

So there would be 45 lines are needed to draw the 10 pointed mystic rose.