Qualification > Math

Perpendicular bisector - what?!

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ivrytwr3:
Got my maths paper 3 coming up and upon doing past papers i nealry always see perpendicular bisectors.  Unfortunately i have not covered these!!!  How do you do them?

As an example there is an example on May/Jun 2006 paper 3 0580/03 0581/03 question 9 (anyone want to post the finished page here?!

Vin:

from next on post ur doubt here ..

https://studentforums.biz/index.php/topic,7086.705.html

i'll see what i can do gimme some time .. ;)

Vin:

sorry for the delay ..

For perpendicular bisector ( | ) symbol .. is basically dividing a line segment to perfect half ..
In the first attachment place the rounder on one end and approx. half cut an arc on both sides .. same for the other side which should intersect .. carefully draw a line joining the arcs .. ;)

Vin:


9 a) i) measure AC and multiply by 10
For these type of sums don’t worry if your answers doesn’t match the markscheme because the printout wich u hav may not according the pdf size .. ju do ur calculation properly
ii) measure ACB with the protactor placed on line AC at point C .. and counting from 180 to whatever the angle is .. (no worries if u hav another method)

b) construct an angle bisector .. same as prep. Bisector but bisecting the angle A
for this u need to place the rounder at A and cut two arcs on AC and AB .. place the rounder at x and y and cut 2 arcs intersecting outside CB .. this is angle bisector .. ;)

pls ask if any doubt ..

ivrytwr3:
ok, that's great and thanks for your help, but still a bit stuck!

I can see how you did the A - BC fenceline, but where is the compass/ruler placed to give you the w - z line?  Question 9 c

Sorry  :-[  

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