Answer:
10
Explanation:
whole circle area = π r² = π*7² =49π
60 = 1/6 of the circle
so 49π/6 is the slice area
then minus the triangle area
triangle area =1/2*6* height
height² =6²-3² =36-9 = 27
so height = 5.2
triangle area =1/2*6* 5.2 =15.6
so the sliver = 49π/6 -15.6 =10