Anishinaabe
Arcs: Tutorial 1: arc geometry


Most Anishinaabe arcs are close to a parabola. A beam of wood will naturally form a parabola when you bring the ends closer together. Parabolas are very common in nature. For example when you toss a ball, its path of flight is a parabola. When you use a drinking fountain, you are drinking from a parabola! 

In mathematics a parabola can be defined as the intersection of a plane with a cone. If we tilt the plane far enough it becomes a circle, so there is a wide range of possible curves. 




By
increasing just width we can make a more shallow curve. How does this
relate to the canoe arcs we saw?
