Unit 12 Lesson 2 Chords and Arcs
Unit 12 Lesson 2: Chords and Arcs
Lesson Overview
Chords in Circles
Key Terms
- Chord
- Converse
- Theorem 12-4
- Theorem 12-5
- Theorem 12-6
- Theorem 12-7
- Theorem 12-8
- Theorem 12-9
- Theorem 12-10
What You Will Learn
- using congruent chords, arcs, central angles, and perpendicular bisectors to chords
- finding the measurement of segments and angles
Overview
In this lesson, you will learn to use congruent chords, arcs, central angles, and perpendicular bisectors to chords. You will show your learning by finding the measurement of segments and angles.
Essential Understanding
You can use information about congruent parts of a circle (or congruent circles) to find information about other parts of the circle (or circles).
- Read pages 500-508 in your course textbook
This course is based on a textbook that is viewable by clicking on the textbook icon. Keep the textbook open while you go through the lesson so that you may refer to it throughout the lesson.
Additional Resources
Proceed to the Next Page
Prepare for Application
Instructions
You have now studied Chords and Arcs. It is now time to demonstrate your learning.
Try the activities below on your own. You should be able to answer these before beginning the practice.
Do these activities in your journal.
Activity 1
In the link below, use the applet ruler to measure the radius of the coin. What is the radius?
Measure the Radius of the Coin
If this applet does not work, you can trace a coin on paper and find its radius.
Activity 2
Refer to Problem 4 on page 504 of your online textbook. In part (b), how does the auxiliary simplify the problem?
Activity 3
In the diagram below, and . How can you show ? From this, what else can you conclude?
Activity 4
What is the value of x in the figure below? Justify your answer.
