Triangle Arts: Part I
Below is an attachment on how you can play around with Triangles to create some interesting patterns. Are you able to figure out the solution? Slide 4 has the answer! And if you do, challenge yourself to create something similar to Slide 5 and 6. Tutorial will be coming up on "Triangle Arts: Part II".

Download the attachment here: http://pptheaven.mvps.org/blog/TriangleArts.zip