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Geo CH 12 Circles

Stepp's Prentice Hall Ch 12 Circles - pictures included try targets

If a line is tangent to a circle, then it is ___ to the radius at the point of tangency perpendicular
A tangent line intersects with a circle exactly __ time(s) 1
Two tangents to a circle from from the same point are ___ congruent
Congruent central angles have congruent ____ chords
Congruent chords have ___ arcs congruent
congruent arcs have congruent ___ angles central
Chords ___ from the center are congruent equidistant
If a two chords are equidistant from the center, they are ___ congruent
A chord (and its arc)that is perpendicular to a radius or diameter is also ____ by it. bisected
The perpendicar bisector bisector of a chord contains the ___ center
inscribed angles are always ___ the arc measure half
T or F: Inscribed angles are equal to central angles False, they are half
T or F: Arc Measure is the same as the measure of the central angle True
T or F: You can make an inscribed angle with a radius and another radius. False, (2 chords)
T or F: The vertex of an inscribed angle is at the center of the circle. False, (on the circle)
T or F: The longest chord you can get from a circle is diameter True
Two inscribed angles that have the same ___ are congruent arc
An inscribed angle whose arc is a semicircle is ___ 90 degrees
Opposite angles of a ____ inscribed in a circle are supplementary quadrilateral
A secant is a line that intersects a circle in ___ point(s) two
The angle formed by a tangent and a ___ is half the measure of the intercepted arc chord
When two lines intersect ____ a circle, the angle they form is half the sum of the two intercepted ars they form. inside
When two lines intersect ____ a circle, the angle they form is half the difference of the two intercepted ars they form. outside
The center of a circle has coordinates (__, __) (h,k)
True or False: A semicircle has an inscribed angle of 180 degrees. False, (arc measure and central angle are 180, inscribed angle is half that or 90.)
To write the equation of a circle in standard form, you need to know the center and the ____ length of the radius
When finding the angle formed by two lines that cross outside the circle you take half the ____ arc minus ___acr formed by the lines bigger, smaller
The point (h,k) is ____ the center of a circle
The value of h in the std form of the equation of a circle is ___ Whatever you are subtracting from x
The value of k in the std form of the equation of a circle is ___ Whatever you are subtracting from y
To write the equation of a circle, you have to have the ___ and the ____ center, radius
To find the radius of a circle when all you have is the center and a point on the circle, you solve for r by inserting your ___ and ___ values. center, point(h,k), (x, y)
Created by: criswell216