Reflection and Line Equations

This video tutorial explains the concept of reflections in geometry, focusing on how shapes are reflected across mirror lines. It covers different types of mirror lines, including vertical, horizontal, and diagonal, and demonstrates how to perform reflections on a coordinate axis. The video also guides viewers on how to describe transformations and identify mirror lines in various scenarios.

What is the term used for the line over which a shape is reflected?

• Axis line

• Symmetry line

• Reflection line

• Mirror line

When reflecting a shape across a diagonal line, what is the key step after reaching the mirror line?

• Reflect vertically

• Continue in the same direction

• Turn 90° and continue

• Stop at the mirror line

What is the equation of a vertical line that crosses the x-axis at 3?

• y = 3

• x = 3

• x = 0

• y = 0

How do you determine the equation of a horizontal line on a coordinate plane?

• By its x-coordinate

• By its y-coordinate

• By its slope

• By its length

In a reflection task, if a shape is 2 squares away from the mirror line, how far should its reflection be?

• 1 square away

• 3 squares away

• 2 squares away

• 4 squares away

What is the equation of the line where the y-coordinate equals the x-coordinate?

• x = y

• x = -y

• y = -x

• y = x

Which transformation involves flipping a shape over a line?

• Rotation

• Reflection

• Translation

• Enlargement

If a shape is reflected in the line x = -3, where is the mirror line located?

• 3 units to the right of the origin

• 3 units to the left of the origin

• On the y-axis

• On the x-axis

What is the equation of a line that crosses the y-axis at 6?

• x = 6

• y = 6

• x = 0

• y = 0

Which of the following is NOT a type of transformation?

• Reflection

• Rotation

• Translation

• Distortion