Posted by stacey on Friday, August 29, 2014 at 1:01pm.
8. When constructing a perpendicular bisector, why must the compass opening be greater 1/2 than the length of the segment?

math  Ms. Sue, Friday, August 29, 2014 at 1:06pm
http://www.sonoma.edu/users/w/wilsonst/courses/math_150/cs/PerpBisect.html

math  stacey, Friday, August 29, 2014 at 1:13pm
i don't get it

math  stacey, Friday, August 29, 2014 at 1:21pm
can you explain it to me

math  Ms. Sue, Friday, August 29, 2014 at 1:25pm
I can't explain it any better than that web site. What is it that you don't understand?
Or try this site.
http://www.mathsisfun.com/geometry/constructlinebisect.html

math  stacey, Friday, August 29, 2014 at 1:32pm
i don't get why the compass has to be open more than 1/2 the length segment

math  Ms. Sue, Friday, August 29, 2014 at 1:35pm
Get a compass and try it.
How else are you going to get arcs above and below the line?

math  stacey, Friday, August 29, 2014 at 1:41pm
so i would answers it like....
the reason that the compass opening has to be greater than 1/2 of the segment is so it can make arcs.

math  Ms. Sue, Friday, August 29, 2014 at 1:53pm
That's a good start. Continue 

math  stacey, Friday, August 29, 2014 at 1:56pm
i don't know how to finish it

math  Ms. Sue, Friday, August 29, 2014 at 2:00pm
Where do the arcs have to cross?

math  stacey, Friday, August 29, 2014 at 2:01pm
in the middle

math  Ms. Sue, Friday, August 29, 2014 at 2:02pm
Right.

math  stacey, Friday, August 29, 2014 at 2:06pm
so now it would be
the reason that the compass opening has to be greater than 1/2 of the segment is so it can make arcs. and the arcs would have to cross in the middle so that when go to draw the line it would be straight.

math  Ms. Sue, Friday, August 29, 2014 at 2:16pm
Yay! You're right!

math  stacey, Friday, August 29, 2014 at 2:17pm
thank you

math  Ms. Sue, Friday, August 29, 2014 at 2:18pm
You're welcome.
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