Coordinate Rotations in the Plane

Mr. Masonet explains how to rotate an object 90° clockwise and counterclockwise on a coordinate plane. The process involves identifying the current coordinates of points, swapping the X and Y values, and determining the new quadrant to adjust the signs of the coordinates. The video demonstrates plotting the new positions for both clockwise and counterclockwise rotations.

What is the first step in rotating an object on the coordinate plane?

• Determine the object's color

• Choose a rotation angle

• Draw the object on the plane

• Identify the current coordinates of the object

Where is point A initially located?

• (-3, 9)

• (3, -9)

• (9, -3)

• (-9, 3)

What should you do with the coordinates before rotating?

• Divide them by 2

• Multiply them by 2

• Swap them

• Add them together

In which quadrant do you end up after a 90° clockwise rotation from the origin?

• Quadrant 1

• Quadrant 4

• Quadrant 2

• Quadrant 3

What are the new coordinates of point A after a 90° clockwise rotation?

• (9, 3)

• (3, 9)

• (-9, -3)

• (-3, -9)

What is the first step in a 90° counterclockwise rotation?

• Determine the quadrant

• Swap the original coordinates

• Identify the new coordinates

• Plot the points

What are the swapped coordinates for point B in a counterclockwise rotation?

• (9, 11)

• (11, 9)

• (1, 9)

• (9, 1)

In which quadrant do you end up after a 90° counterclockwise rotation?

• Quadrant 1

• Quadrant 4

• Quadrant 2

• Quadrant 3

What are the new coordinates of point C after a 90° counterclockwise rotation?

• (5, 3)

• (-3, -5)

• (3, 5)

• (-5, -3)

What is the final step in any 90° rotation?

• Swap the coordinates

• Adjust the signs

• Plot the points

• Determine the quadrant