Central Angles, Radii, and Chords
- Kim Hager
1) What do you think of when you hear the word "central"? 2) What do you think of when you hear the word "inscribed"? 3) What does the word "circumnavigate" mean?
Identifying Features of a Circle
Radii and Chords
Given the applet above, name two radii of the circle.
Given the applet above, name one chord of the circle.
How can you make a second chord without drawing any new segments?
What do you notice as you move the points on the circle?
Using the applet as a guide, what do you think a central angle is?
What do you wonder about as you look at and manipulate the applet?
A Note about Arcs
Using the applet above, if m<BAC is 120 degrees, what is the measure of arc BC?