Triangle
A triangle’s angles add up to 180 degrees every single time, and it has refused all requests to vary this.
Square
A square has four equal sides and four right angles, and has never once been wrong.
Left side
The left side is the side that isn’t the right side, and it knows this by knowing exactly where the right side isn’t.
Circle
A circle is a shape with no corners, which it achieved by going round all of them.
Number 7
The number 7 has remained between 6 and 8 since 1978, despite 6 being afraid of it.