Plane geometry
Example - 1
Example - 2
Example - 3
Example - 4
Example - 5
Example - 6
Example - 7
Example - 8
Example - 9
Example - 10
Example - 11
Example - 12
Example - 13
Example - 14
Example - 15
Example - 16
Example - 17
Example - 18
Pytagorean prove
Example - 20
Example - 21
Example - 22
Example - 23
Example - 24
Example - 25