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 \begin{align*}A\end{align*} to 2 different positions and move point \begin{align*}B\end{align*} to 2 different positions and collect the data in the table below.
Position  Measure of \begin{align*}\angle{ACB}\end{align*}  Measure of \begin{align*}\angle{ADB}\end{align*}  Measure of \begin{align*}\angle{ABE}\end{align*} 

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.
Notes/Highlights Having trouble? Report an issue.
Color  Highlighted Text  Notes  

Please Sign In to create your own Highlights / Notes  
Show More 
Image Attributions
To add resources, you must be the owner of the section. Click Customize to make your own copy.