TURN
Definition Of Turn
Rotating a plane figure is called turn.
To rotate a plane figure.
Examples of Turn
Figure-2 is obtained by rotating the Figure-1.
Video Examples: iCoachMath
Solved Example on Turn
Ques: Which figure represents a turn?
Choices:
A. Figure 1 and Figure 2
B. Figure 2 and Figure 3
C. Figure 1 and Figure 3
D. None of the above
Correct Answer: C
Solution:
Step 1: A rotation is a transformation that turns a figure about a fixed point called the center of rotation.
Step 2: Among the figures, in Figure 1 and Figure 3, the figures are turned about a fixed point called the center of rotation.
Step 3: So, Figure 1 and Figure 3 represent rotation or turn.
Quick Summary
- A turn rotates a shape around a center point.
- The shape's size and form remain the same during the rotation.
- Turns can be clockwise or counter-clockwise.
⚠️ Common Mistakes
- Confusing rotations with reflections or translations.
- Not understanding the center of rotation.
- Incorrectly determining the angle of rotation.
🌍 Real-World Uses
- The rotation of a Ferris wheel, transforming the position of each car.
- Adjusting the volume knob on a radio, which involves a circular turn affecting the resistance.
- Opening a combination lock, where each turn of the dial changes the aligned numbers.
- The movement of gears in machinery, where turning one gear causes another to rotate.
- Steering a car, which uses a circular turn of the steering wheel to adjust the car's direction.
🔗 Related Links
🍎 Teacher Insights
Use physical objects like blocks to demonstrate rotations. Emphasize visualizing the movement.🎓 Prerequisites
- Basic shapes (squares, triangles, etc.)
- Spatial reasoning
- Understanding of direction (clockwise, counter-clockwise)
Check Your Knowledge
Q1: Which of the following represents a turn/rotation?
Frequently Asked Questions
Q: What happens to the size of the figure when it is turned?
A: The size remains the same.
Q: What is the center of rotation?
A: It is the fixed point around which the figure is rotated.