c.	Identify and describe the radius and diameter of a circle. <br class="" /><br class="" /><img src="http://emed.nucenter.org:8171/2010-12-10/3.1c+Circles+-+radius%252C+diameter-posterimage.png" height="272" width="480" role="button" alt="http://emed.nucenter.org:8171/2010-12-10/3.1c+Circles+-+radius%252C+diameter.m4v" class="aligncenter posterimg" tabindex="0" />

3.1a Lines – parallel, perpendicular, intersection

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