1. Chapter 10.3
Arcs and chords

2. Chords (not like in music)
A chord is a segment with endpoints on a circle. If a chord is not a diameter, then its endpoints divide the cirlce into a major and a minor arc

3. Concept

4. Use Congruent Chords to Find Arc Measure
Jewelry A circular piece of jade is hung from a chain by two wires around the stone. JM  KL and = 90. Find

5. A. 42.5
B. 85 C
D. 170

6. Use Congruent Arcs to Find Chord Lengths

7. A. 6
B. 8
C. 9
D. 13

8. Concept

9. Use a Radius Perpendicular to a Chord
Answer:

10. A. 14
B. 80
C. 160
D. 180

11. Use a Diameter Perpendicular to a Chord
CERAMIC TILE In the ceramic stepping stone below, diameter AB is 18 inches long and chord EF is 8 inches long. Find CD.

12. In the circle below, diameter QS is 14 inches long and chord RT is 10 inches long. Find VU.

13. Concept

14. Chords Equidistant from Center

15. A. 7
B. 10
C. 13
D. 15