Circles Vocab

Circles Resource Page



Radius - The distance from the center of a circle to the edge.

Diameter - The distance across a circle, through the center.










Circumference - The distance around a circle (a circle's perimeter).

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Orthocenter - The point where the three altitudes of a triangle intersect.

Here is a helpful link: http://www.mathopenref.com/triangleorthocenter.html




Centroid - The point where the three medians of the triangle intersect.
http://www.mathopenref.com/trianglecentroid.html