10.2: Inscribed Angle Theorem
This activity is intended to supplement Geometry, Chapter 9, Lesson 4.
Problem 1 – Inscribed Angle Theorem
Start the Cabri Jr. application by pressing the APPS key and selecting Cabri Jr. Open the file INSCRIB1 by pressing
1. Move point
Position 
Measure of 
Measure of 


1  
2  
3  
4 
2. Angles
Open the file INSCRIB2. You are given circle
3. Move point
Position 
Measure of 
Measure of 

1  
2  
3  
4 
4. Make a conjecture about two inscribed angles who intercept the same arc in a circle.
Open the file INSCRIB3. You are given circle
5. In circle
6. In circle
Problem 2 – Extension of the Inscribed Angle Theorem
Open the file INSCRIB4. You are given circle
7. Move point
Position 
Measure of 
Measure of 
Measure of 

1  
2  
3  
4 
8. Make a conjecture: The angle formed by the intersection of
Open the file INSCRIB5. You are given circle
9. Move point
Position 
Measure of 
Measure of 
Measure of 

1  
2  
3  
4 
10. Make a conjecture: The angle between a chord and the tangent line at one of its intersection points equals ______________ of the central angle intercepted by the chord.
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Date Created:
Feb 23, 2012Last Modified:
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