It is 6 because 3x3=9 then you do the same for 2 so 6/9
What worksheet or are you talking to somebody else
3 sides of square is 3*12=36 cm
perimeter for the full circle is 2 * pi * radius
which is =2 * 22/7 * 12 =75.43 cm
so 360° =75.43 cm
for 150° = 75.43/360 *150 =31.43
all together =36 +31.43 =67.43 cm
I think the rule might be x-9
