Challenge 2

If [math]m\angle CEI=60^{\circ},m\angle ENI=40^{\circ},m\angle CNI=2c[/math] and [math]m\angle NEI=2b+c[/math], find the value of b.
If you want to measure an angle, use the angle measure tool.
Click on the points in a clockwise order with the vertex as the 2nd point.
– Debra Schneider

Information: Challenge 2