![Inside Triangles](/sites/default/files/styles/medium/public/thumbnails/content-id-5648-icon.png?itok=eh8JaYbt)
problem
Inside Triangles
How many different triangles can you draw on the dotty grid which each have one dot in the middle?
![Poly Plug Rectangles](/sites/default/files/styles/medium/public/thumbnails/content-id-7511-icon.png?itok=jGv2RY6A)
problem
Poly Plug Rectangles
The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?