AC 2.1.9: 2-83a-c tiles (CPM)

1. AC 2.1.9 2-83a:

AC 2.1.9 2-83a:

2. AC 2.1.9 2-83b:

AC 2.1.9 2-83b:

3. AC 2.1.9 2-83c:

AC 2.1.9 2-83c: