Reflecting a polygon over a horizontal line of symmetry

The video tutorial explains how to reflect a polygon across a symmetrical line, referred to as line M. It emphasizes maintaining equal distances from the line for accurate reflection. The tutorial covers plotting new points, handling points directly on the line, and the importance of correct labeling of transformed points. The instructor provides a step-by-step guide to ensure the reflection is accurate and properly labeled.

What is the key principle to remember when reflecting a polygon across a symmetrical line?

• The polygon should be translated parallel to the line.

• The polygon should be rotated around the line.

• The distance from the line should remain the same.

• The distance from the line should be doubled.

When plotting new points after reflection, what must be ensured about their distance from the line of symmetry?

• They should be twice as far from the line.

• They should be at the same distance as the original points.

• They should be half the distance from the line.

• They should be at a random distance from the line.

What happens to points that lie directly on the line of symmetry after reflection?

• They are removed from the diagram.

• They remain unchanged.

• They move to a new position.

• They are doubled in number.

Why is it important to label the transformed points correctly after reflection?

• To ensure they are not confused with original points.

• To make the diagram look more complex.

• To increase the number of points in the diagram.

• To change the shape of the polygon.

What should be done if a point has no distance from the line of symmetry?

• Remove it from the diagram.

• Double its distance from the line.

• Move it to a new position.

• Leave it unchanged.