Chapt 12 Math
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Last updated 9:28 PM on 11/27/25
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13 Terms
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Radian
Measurement of an angle with its vertex at the center of the circle
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Sector
The region enclosed by two radii and an arc
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Arc
A part of the circumference of a circle
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Chord
The line segment joining two points on the circumference of a circle
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Segment
is the region between a chord and an arch
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Vertex
The center point from where the sides emerge
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Initial side
Positive x axis always
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Terminal side
Can be any axis or quadrent depending on size of angle
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Coterminal angles
Think the larger angle of the segment (cycled the other way round)
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Sinθ
sin(180-θ)
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cosθ
cos(-θ)
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tanθ
tan(180 + θ)
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Identity
An identity is an equation that is always true
