How to rotate a line 90 degrees counter clockwise

The video tutorial explains the concept of counterclockwise rotations around a fixed point, typically the origin. It covers the steps to perform a 90-degree counterclockwise rotation by swapping the X and Y coordinates and making the Y negative. The tutorial includes practical examples and encourages students to practice on paper to understand the concept better.

What is the default fixed point for rotations unless specified otherwise?

• The center of the shape

• The origin

• The midpoint of the line

• The top-left corner

In which direction is a counterclockwise rotation performed?

• To the right

• To the left

• Upwards

• Downwards

What makes rotations more challenging than reflections?

• They are less intuitive

• They need a fixed point

• They involve changing the shape

• They require more calculations

What is the first step in rotating a point 90 degrees counterclockwise?

• Swap the X and Y coordinates

• Make both coordinates negative

• Add 90 to each coordinate

• Reflect over the Y-axis

After swapping the coordinates for a 90-degree counterclockwise rotation, what is the next step?

• Add 90 to the Y coordinate

• Make the Y coordinate negative

• Make the X coordinate negative

• Reflect over the X-axis

What should you do if you're having trouble visualizing a rotation?

• Ignore the fixed point

• Ask a friend

• Draw it on paper

• Use a calculator

Why is it important to know the fixed point during a rotation?

• It determines the direction of rotation

• It helps in calculating the angle

• It remains stationary during rotation

• It changes the size of the shape