Parts: Triangle graph paper Cardstock, assorted Tools: Ruler Self-healing cutting mat Scissors Craft knife Bone folder Pencil Glue stick Digital craft cutter, (optional) such as the Silhouette 2 ...

The new control center helps Duke Energy Progress personnel decide how electricity should move across the state’s grid.

Each grid cell is activated when an animal's position coincides with a vertex on a grid of equilateral triangles representing the environment.