Square feet.
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I would use centimetres to give the area in square centimetres.
a stop sign has eight sides. ten times eight is eighty, therefore the awenser is eighty inches
Measure one side of the stop sign, and call it Bob. The area is approximately Bob times Bob times 4.828427. - - -- --- Some boring math people might say it like this: A=2(1+√2)s2
you stop at the white line instead of the stop sign, the stop sign would be to far
Well you would simply stop before the sign, meaning that there is an imaginary stop-line that extends from any stop sign, and you must stop before you cross that line.
Inches. Most are less than a yard. As most road sign standards and conventions describe signs in terms of inches and/or millimeters, I personally would not use yard measurements and would use inches.
A stop sign is normally a reguar polygon of some sort, such as a regular octagon, so all sides have the same length.
As a stop sign
That would be the stop sign.
The reason a stop sign is perpendicular is so that it can be seen. If the sign was leaning forward or backward, it would be difficult for oncoming traffic to see it.
A California stop is a rolling stop which someone would make in an automobile when encountering a stop sign.
That sign would be the stop sign, the 4-way sign tell you that at that intersection, 4 of the directions of travel through the intersection (including yours) have a stop sign.
you only have to stop at a yield sign if there is cross traffic - if it would not be safe for you to continue through the intersection. Typically only one road at the intersection will have a yield sign - the other one will either have no sign or a stop sign/light.