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# Alison wants to construct the perpendicular bisector of MN¯¯¯¯¯.

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Alison wants to construct the perpendicular bisector of MN¯¯¯¯¯¯¯.

What should Alison do for her first step?

Place the point of the compass on point M and draw an arc, using a width for the opening of the compass that is equal to12MN​ .

Place the point of the compass on point M and draw an arc, using a width for the opening of the compass that is greater than 12MN.

Use the straightedge to draw a line that intersects MN¯¯¯¯¯¯¯ at a point between M and N.

Place the point of the compass on point M and draw an arc, using a width for the opening of the compass that is less than12MN.

AngelRay  Nov 8, 2017
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Place the point of the compass on point M and draw an arc, using a width for the opening of the compass that is greater than (1 / 2) MN.

Here's a  step - by - step demonstration :

https://www.mathopenref.com/constbisectline.html

CPhill  Nov 8, 2017

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