How do you construct a perpendicular bisector
google is your friend. I can tell you how, but you can find many illustrated instructions online.
Place compass at one end of line segment. Mark an arc with radius more than half the line length.
Do the same at the other end.
Make sure the arcs are long enough to intersect in two places.
Draw a line connecting the two intersection points. That is the perpendicular bisector of the first line.
ms sue please help :)
Sorry, I don't remember. I haven't done that in about 65 years.
It uses a compass and a pencil.
Google is a big help!
http://www.google.com/#q=construct+a+perpendicular+bisector
To construct a perpendicular bisector, you will need a straightedge (such as a ruler) and a compass. Here are the steps:
1. Draw the line segment that you want to bisect. Let's call the endpoints of the line segment A and B.
2. Place the point of your compass on point A and set the compass to a length greater than half the length of the line segment AB.
3. Without changing the compass width, draw two arcs on either side of the line segment AB. Label the intersection points of the arcs with the line segment as C and D.
4. With the compass still set to the same width, place the point of the compass on point B and draw two more arcs above and below the line segment AB. Label the intersection points of the arcs with the line segment as E and F.
5. Using a straightedge, draw a straight line through the points C and D. This line will be the perpendicular bisector of the line segment AB.
6. Repeat step 5 with a straight line through the points E and F. This line will also be a perpendicular bisector of the line segment AB.
Now you have constructed two perpendicular bisectors that intersect at a right angle at the midpoint of the line segment AB.