Studied by 0 peopleCircle
the set of points equal distances from a given point (the center)
radius
a segment with endpoints on the center and on the circle
chord
a segment with endpoints on the circle
diameter
a chord that passes through the center and has 2 points on the circle
secant
a line that intersects the circle in two places
tangent
a line that intersects the circle in one place only
point of tangency
the point on the tangent that intersects with the circle
central angle
an angle with a vertex in the center and two sides that are radii
inscribed angle
an angle with all three points on the circle and the two lines are chords
arc
a portion of the edge of the circle inscribed with two points
symbol: ( but on it’s side, over the top of the letters
major arc
an arc with a measure of 180 degrees or higher
*three letters - be careful, this might be a semi circle
minor arc
an arc with a measure of less than 180 degrees
*2 letters
semicircle
an arc with endpoints on the diameter - always equal to 180 degrees
area formula
A=(pi)r²
circumference
C=2(pi)r
arc length formula
L=x*c/360
Note
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