A straight edge
Place the ruler side by side with the object. One of the edges of the object should be in the "0" value of the ruler. Then just see where the other edge is and there you have it.
An arc (segment of a circle) has one straight side, and one curved side.
By looking at the object straight, instead of from either side?
Is called a straight angle.
That would be a pentagon.
Place the ruler side by side with the object. One of the edges of the object should be in the "0" value of the ruler. Then just see where the other edge is and there you have it.
An arc (segment of a circle) has one straight side, and one curved side.
Nothing, a straightedge is a ruler. Straightedge is just another name for a ruler. You can also draw straight lines with things such as the side of a folder or anything else with a flat edge.
use a ruler to measure the lenght of each side of the object
use a ruler!!!!how do you use a ruler with a semicircle EDIT: Assuming you can measure the length of the straight side.. to find the perimeter - treat it as a whole circle, and find the circumference through multiplying the diameter (straight edge) by Pi. Then - divide that figure by 2, and add on the length of the straight side ! Snakester1962 (Supervisor)
By looking at the object straight, instead of from either side?
Is called a straight angle.
straight
Its called the "profile" or if your looking straight at it its called the "face"
That would be a pentagon.
It is a straight angle.
It depends on where the ruler was made, and if you recognize the authority of the queen.