circle properties
in the same circle or in congruent circles, all radii are ____?
equal :P
a line that has one and only one point in common with a circle
tangent
a central angle is measured by _____?
its intercepted arc
in the same circle or in congruent circles, two central angles are equal if ____?
the arcs they intercepted are equal
the longest chord in a circle
diameter
a circle is determined by a given point as ____ and a given line as ____?
point as center and a given line as radius o_O
a straight line that cuts the circle in two points
secant
an inscribed angle is measured by ____?
one half of its intercepted arc
in the same circle or in congruent circles, two arcs are equal if ___?
the central angles which they subtend are equal OR if the chords they subtend are equal
an angle inscribed in a semicircle is a (what kind) angle.
right angle
if the radius of a circle is 3 in., a point that is 5 in. from the center will be ___( inside, outside, on) the circle?
outside of the circle :D
a figure bounded by an arc of a circle and its chord
segment
an angle formed by two chords intersecting in a circle is measured by ____?
one half of the sum of the intercepted arcs on either side
in the same circle or in congruent circles, two chords are equal if ____?
the arcs they subtend are equal OR if they are equally distant from the center
a diameter or radius perpendicular to a chord ____ (does what) the chord and the arcs subtended by it.
bisects/cuts
circles having equal radii or equal diameters are ____?
congurent
the line that joins the centers of two circles
center segment (or center line)
how many common tangents do two circles have if one is wholly without the other?
4
tangents drawn to a circle from an external point are ____?
equal
an angle formed by two secants intersecting outside of a circle is measured by ____
1/2 the difference of the intercepted arcs
two circles which have the same center are?
concentric -_-
the chord joining the points of intersection of two intersecting circles
common chord :I
how many common tangents do two intersecting circles have?
2
arcs intercepted between ____ lines are equal
paralell
tangents to a circle at the ends of a diameter are ____
parallell