CENTRE OF ROTATION
Definition Of Centre Of Rotation
Centre of Rotation is the fixed point around which a two-dimensional figure is rotated.
More About Centre of Rotation
A two-dimensional figure always rotates around a point and a three-dimensional figure rotates around an axis.
Video Examples: centre of rotation
Example of Centre of Rotation
In the above diagram, the ferry wheel rotates around a fixed point and that point is called the center of rotation.
Solved Example onCentre of Rotation
Ques: Identify the center of rotation of the following figure.
Choices:
A. Figure 1
B. Figure 2
C. Figure 3
D. Figure 4
Correct Answer: A
Solution:
Step 1: Center of rotation is the point around which the figure is turned.
Step 2: For the given figure, the center of rotation is the center of the figure.
Step 3: The center of rotation is shown in Figure 1.
Quick Summary
- A two-dimensional figure always rotates around a point.
- The fixed point is called the centre of rotation.
🍎 Teacher Insights
Use physical manipulatives (e.g., tracing paper) to demonstrate rotations and the centre of rotation.🎓 Prerequisites
- Basic understanding of shapes
- Concept of turning or rotation
Check Your Knowledge
Q1: Which of the following describes the centre of rotation?
Frequently Asked Questions
Q: Can the centre of rotation be outside the figure?
A: Yes, the centre of rotation can be located inside, outside, or on the figure.