Reflection Transformations in Geometry

This video tutorial covers the concept of reflections in geometry, focusing on how shapes are reflected across mirror lines. It explains the process of reflecting shapes using vertical, horizontal, and diagonal mirror lines, and how to perform reflections on a coordinate axis. The video also discusses how to describe transformations and identify mirror lines in given shapes.

What is the term used for the original shape before it is reflected?

• Image

• Object

• Mirror

• Reflection

When a shape is reflected over a vertical mirror line, how does the distance of the reflection compare to the original shape?

• It is twice the distance

• It is half the distance

• It is the same distance

• It is unrelated

If a point is 3 squares away from a diagonal mirror line, how should it be reflected?

• 3 squares diagonally

• 3 squares perpendicular to the line

• 3 squares in the opposite direction

• 3 squares in the same direction

What is the equation of a line where all x-coordinates are the same?

• x = a constant

• x = y

• y = x

• y = a constant

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

• By the slope

• By the intercept

• By the y-coordinate

• By the x-coordinate

What is the equation of the line that reflects a shape where the y-coordinate equals the x-coordinate?

• y = -x

• x = y

• y = x

• x = -y

Which transformation involves flipping a shape over a line?

• Rotation

• Reflection

• Enlargement

• Translation

In a reflection, what is the line called that acts as the 'mirror'?

• Symmetry line

• Axis line

• Mirror line

• Reflection line

If a shape is reflected in the line y = -x, what is true about the coordinates of the reflected points?

• x and y are negatives of each other

• x is double y

• x is half of y

• x and y are equal

What is the first step in describing a reflection transformation?

• Label the image

• Identify the shape

• Draw the mirror line

• Write the equation of the line