Baklava is a Turkish desert that is shaped in triangles. We have a rectangular cookie sheet that is 8î high and 20î long. If the baklava is shaped like the triangles below, which shapes will tesselate the entire cookie sheet?

Pics of right, isoceles and obtuse triangles that are 1" by 4".

Possible Extensions:

Will the following triangles cover the entire cookie sheet?

Pics of right triangles- 1x3, 1x2, 1x5

Will the following triangle cover the entire cookie sheet?

Pic of equilateral triangle- sides = 4"