Three nonconducting strips are bent to form arcs and, when assembled, they form part of a circle of radius
r = 6.37 cm.
The three strips have linear charge densities of
𝜆1 = 89.0 nC/m,
𝜆2 = −179 nC/m,
and
𝜆3 = 268 nC/m,
respectively, and subtend angles of 60°, 120°, and 45°, respectively, at the center.