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9.1 Notes.notebook
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a set of points equidistant from a central point
the segment from the center of a circle to any point on the circle.
edge to edge through the center
the central point that is equidistant from every point on the circle
a segment whose endpoints are on the circle
an unbroken part of a circle, part of the circumference
named with endpoints and 1 other letter on the arc
a 180 degree arc
half a circle made with a chord of the diameter.
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<ABC
endpoints of the angle are on the circle and the vertex is at the center of the circle
measured in degrees is how OPEN an arc is.
same measure as a central angle
an arc that is less than 180 degrees
only described with endpoints
an arc that is more than 180 degrees
described with endpoints and 1 other letter on the arc
measure of how LONG an arc is in units (cm, in, m, yd....)
*Not the same as the arc measure
***Degree measures of all arcs in a circle will add to = 360
***Arc lengths add to = the circumference of the circle
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60
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