ANGLE OF ROTATION
Definition Of Angle Of Rotation
Angle of rotation is the measure of degrees that a figure is rotated about a fixed point.
More about Angle of Rotation
A rotation is a transformation that turns a figure about a fixed point called the center of rotation.
Examples of Angle of Rotation
In moving from point A to point B (clockwise), the angle of rotation of the Ferris wheel is 450.
Video Examples: Rotational Symmetry, Order and angle of Rotation
Solved Example Clockple on Angle of Rotation
Ques: Find the angle of rotation.
Choices:
A. 1200
B. 600
C. 450
D. 900
Correct Answer: B
Solution:
Step 1: A rotation is a transformation that turns a figure about a fixed point called the center of rotation.
Step 2: Use a protractor to measure the angle of rotation.
Step 3: The angle of rotation is observed as 600.
Quick Summary
- Rotation is a transformation that turns a figure about a fixed point called the center of rotation.
- The angle of rotation is measured in degrees.
🍎 Teacher Insights
Use visual aids and hands-on activities to demonstrate rotations. Emphasize the difference between clockwise and counterclockwise rotations.🎓 Prerequisites
- Basic Geometry
- Angles
- Degrees
- Transformations
Check Your Knowledge
Q1: What is the angle of rotation if point A is rotated to point B on a Ferris wheel?
Q2: If a figure is rotated a quarter turn clockwise, what is the angle of rotation?
Frequently Asked Questions
Q: What is the center of rotation?
A: The center of rotation is the fixed point about which a figure is rotated.
Q: How do you measure the angle of rotation?
A: Use a protractor to measure the angle between the pre-image and image of a point after rotation.