GEOMETRY Warm Up:Complete pg. 70 # 1-8 and # 10 (refreshing your memory)

#1-8 #10

Will be around to collect reflection questions

BEFORE we begin chapter 6......--MUST KNOW VOCAB!

-Hard chapter-Will try to review as much as possible-Will spend more time on this chapter-Will NOT give extra time on chapter if you act like fools

-DO YOUR OWN WORK!!!!-Visually you have to be able to switch back

and forth with vocabulary to see what it is asking.

What do you see here.....

You will be able to go back and forth- it takes practice!!!

There are two types of angles in circles:

-Central Angles --vertex is the center of the circle--measure < is ≅ to the arc it touches--made up of 2 radii--DO NOT use ≅ marks on the circle

65°

radii

arc in question

vertex

65°

Inscribed angles:-vertex is ON the circle-sides made up of chords-measure < is half of the arc it touches

chords

vertex 57°

arc in question

114°

Chords and arcs:-if 2 chords are ≅ then the arcs they intercept are ≅

ΑΝD the central angles are ≅

chords

42°

42°

42°

42°

Chords and the center of a circle:-the perpendicular from the center to a chord

bisects the chord-if you go backwards and say the perp bisector

passes through the center-also 2 ≅ chords are equidistant from the center

chord

radius

2 chords that are ≅ therefore they are the same distance from center (orange)

Try some more....

http://www.pearsonsuccessnet.com/snpapp/iText/products/0-13-037878-X/Ch11/11-02/PH_Geom_ch11-02_Gizmo.html