Slimness factors of a lollipop shape
Illustrates the various slimness factors of a lollipop shape. See:
Move the slide b. See how the enclosed-square-slimness remains the same while the enclosing-square-slimness grows.
Euler line investigation 9 with JS in 42
Details of Fisher's Formula Long Version
Triangle to Square Puzzle
Centres in a Triangle
large angle of triangle