Week 1 Warm Up 03.22.12 Add theorem 2.1 here next year.

I will use the properties of chords of circles. Section 10.2 Day 2 I will use the properties of chords of circles. Congruent Arcs Two arcs of the same circle or congruent circles are congruent if they have the same measure. yes yes no

Arcs – Corresponding Chords Theorem 10.4 Arcs – Corresponding Chords In the same circle, or in congruent circles, two minor arcs are congruent if and only if their corresponding chords are congruent.

Arcs – Diameter Bisector Theorem 10.5 Arcs – Diameter Bisector If a diameter of a circle is perpendicular to a chord, then the diameter bisects the chord and its arc.

Chord – Perpendicular Bisector Theorem 10.6 Chord – Perpendicular Bisector If one chord is a perpendicular bisector of another chord, then the first chord is a diameter.

Ex 1

Chord – Center Equidistance Theorem 10.7 Chord – Center Equidistance In the same circle, or congruent circles, two chords are congruent if and only if they are equidistant from the center.

Ex 2 Find CF 8 AB = 8 DE = 8 8 CD = 5   1 2   3 CG = CF ( T10.7)     3 = CF        

Do 1: Assignment: Textbook Page 608 , 39 – 51 all.

Activity Don’t Write