it was invented in 1976 by sir Morgan Harvey
Stop signs are usually octagonal, so internal angles are 135°
The angles are obtuse angles. The stop sign is octagonal in shape. Assuming it is a regular octagon, then: exterior_angles = 360o ÷ 8 = 45o -> interior angle = 180o - 45o = 135o
A stop sign is hexagonal (six sides).A stop sign has 8 sides!
it looks like a stop sign a stop signits like a stop sign
An octagon (like a STOP sign).
William Eno
Ben Dover
A stop sign with thickness.
An octagonal prism
So that if the sign is unreadable due to snow/dirt, it can still be recognised by the shape alone.
I have two. Ones a stop sign, and the other is a lamp shade.
Stop signs are usually octagonal, so internal angles are 135°
I'm sure that it's not. It's a thick octagon.
It's an octagon. Look at a stop sign- they're octagonal.
British stop signs are octagonal to make them easily identifiable even when they are obscured by dirt or snow.
The octagonal shaped sign was colorful.
In the US, STOP signs are Octagonal (8 sided), with a bright red background and white letters saying STOP.