fix triangle calculations on different starting points
Update main.py
Update main.py
Changed Footer
Merge pull request #3 from alexvalentine/master

Update main.py - add the "t" to "heigh" in documentation of rect!
Merge pull request #4 from alexvalentine/patch-1

Update main.py - change 'x-10' to 'x=10' in documentation for arc!
Changed Header
fix triangle unadjusted count
use matplotlib instead of mayavi
Merge branch 'matplotlib' into triangular_meander
make backend configurable, jminardi/#5
Merge branch 'matplotlib' into triangular_meander