23 terms


C=2∏r or C=∏d
circumference formula
sum of central angles
minor arc
arc that is less than 180°
formula to find an arc length
their corresponding chords are congruent
two minor arcs are congruent if and only if...
BA ____?____ VT
they are equidistant from the center
two chords are congruent if and only if...
the intercepted arc for ∠B
What is the red line?
∠ABC= ½(mADC)
How would you find ∠ABC?
How would you find mADC?
then the angles are congruent
if two inscribed angles of a circle intercept congruent arcs or the same arc...
then its opposite angles are supplementary
If a quadrilateral is inscribed in a circle...
then it is perpendicular to the radius drawn to the point of tangency
If a line is tangent to a circle..
then the line is tangent to the circle
If a line is perpendicular to a radius...
they are congruent
what is the relationship between 2 tangent lines that meet at a point in the exterior of a circle
m∠1= ½(mAC + mBD)
how would you find m∠1
then the measure of each angle formed is half the measure of the intercepted arc
If a secant and a tangent intersect at the point of tangency...
m∠A= ½(mDE-mBC)
how would you find ∠A (2 secants)
m∠A= ½(mDC-mBC)
how would you find ∠A (Secant-tangents)
m∠A= ½(mBDC-mBC)
how would you find ∠A (2 tangents)
formula for finding the lengths of the segments of intersecting chords
formula for finding the lengths of the segments of secant segments that intersect
formula for finding the lengths of the segments of tangent and secant segments that intersect