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Study
Parts of Circles
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Name a radius.
AE or AF
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A line that intersects the circle twice is called a _____.
secant line
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Type of arc that is less than 180 degrees.
minor arc
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Point where the tangent line touches is called a _____.
point of tangency.
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Name the point of tangency.
Point D
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Line segment from the center to a point on the circle is called a _____.
radius
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Name the figure.
Diameter EF
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Name the minor arc.
Arc KL
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Name the tangent line.
DH
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Name the figure.
Secant Line GH
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What is the difference between a secant line and a tangent line?
A secant line intersects the circle twice, but a tangent line only touches the circle once.
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Name the figure.
Chord CD
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A line that touches the circle once is called a _____.
tangent line
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Set of all points that are the same distance from the center point is called a _____.
circle
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Type of arc that is exactly 180 degrees.
semi-circle
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Name the diameter.
EF
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Name the figure.
Sector ONP
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Name the figure.
Tangent Line IJ
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What is the longest possible chord of a circle called?
Diameter
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Name the secant line.
BC
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Name the figure.
Radius AB
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Name the figure.
Circle A
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What is the point of tangency?
Point I
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A chord that passes through the center of the circle is called a _____.
diameter
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Name the major arc.
Arc LMK
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Line segment whose endpoints are on the circle is called a _____.
chord
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Name the circle.
Circle A
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Piece of the circumference (outside) of the circle is called an _____.
arc
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Name the chord (not the diameter).
GI
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Type of arc that is more than 180 degrees.
major arc
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Piece of the area of the circle is called a _____.
sector
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