Explanation

Examples:

• Identity matrix → no change

• Scaling matrix → resize

• Reflection matrix → flip

• Rotation matrix → turn

Example (reflection across x-axis):
[ 1 0 ]
[ 0 −1 ]

Quiz

1. What does the identity matrix do?

2. What does a scaling matrix do?

3. Can matrices flip shapes?

4. Do transformations preserve straight lines?

5. Are distances always preserved?

Answer Key

1. Nothing

2. Resizes

3. Yes

4. Yes

5. No