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Geometry Ch 12 Fitch FMS
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Terms in this set (18)
12-1 Tangent to a Circle (Tangente, Qiēxiàn, jeobseon)
A coplanar line that intersects the circle in exactly one point
12-1 Point of Tangency
The point where a circle and a tangent intersect
12-1 Tangent and Radius (or Diameter)
are perpendicular
12-1 Two tangents from 1 point to 1 circle
are congruent
12-2 Chord (acorde, corde, Xián, hyeon)
A segment whose endpoints are on a circle
12-2 Central Angle
An angle whose vertex is the center of the circle and the sides are radii
12-2 Intercepted Arc
The portion of the circle that lies between the two sides of an angle
12-3 Inscribed Angle
An angle whose vertex is on the circle and the sides are chords
12-3 The measure of an inscribed angle
is half the measure of the intercepted arc
12-3 An angle inscribed in a semicircle
is a right angle
12-3 Opposite angles of quadrilateral inscribed in a circle
are supplementary
12-3 An angle between a tangent and a chord
is half the measure of the intercepted arc
12-4 Secant (secante, Gē xiàn, sikeonteu)
A line that intersects a circle at two points
12-4 The angle formed by 2 lines that intersect inside a circle
half the sum of the intercepted arcs
12-4 The angle formed by 2 lines that intersect outside a circle
half the difference of the intercepted arcs
12-4 To find lengths of intersecting segments with circles
point to circle times point to circle equals point to circle times point to circle
12-5 Standard equation of a circle
(x - h)^2 + (y - k)^2 = r^2
12-5 The center of the circle
(h, k)
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