Reflection and Transformation Concepts

Mrs. Yaud introduces the concept of reflections in geometry, explaining how figures are flipped over a line of reflection. The lesson covers vocabulary, graphing reflections over the x-axis and y-axis, and solving practice problems. Students learn to draw figures and their reflections, and apply these concepts in a pinball game scenario to determine if a ball hits a bonus target.

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

• Line of reflection

• Axis of rotation

• Mirror line

• Line of symmetry

When reflecting a triangle over the x-axis, what happens to the y-coordinates of the points?

• They become negative

• They remain the same

• They are halved

• They double

What notation is used to denote a point after it has been reflected twice?

• Prime

• Triple prime

• Quadruple prime

• Double prime

What is the result of reflecting a shape over both the x-axis and y-axis?

• The shape remains unchanged

• The shape rotates 90 degrees

• The shape flips and changes direction

• The shape flips upside down

In the exercises, what was the main difference between a reflection and a translation?

• A reflection flips the figure over a line

• A translation flips the figure over a line

• A translation involves rotating the figure

• A reflection changes the size of the figure

What is the first step in drawing a reflection over the x-axis?

• Identify the y-axis

• Count the distance to the line of reflection

• Calculate the midpoint of the shape

• Draw the original shape

In the exercises, what was the purpose of identifying the coordinates of the image?

• To check the size of the image

• To verify the reflection was done correctly

• To measure the distance between points

• To calculate the area of the image

When reflecting a figure over the y-axis, what happens to the x-coordinates of the points?

• They become negative

• They are halved

• They double

• They remain the same

In the pinball game example, what is the key to determining if the ball will hit the bonus target?

• Calculating the speed of the ball

• Checking the size of the bonus target

• Measuring the angle of reflection

• Counting the distance up and over

How can you verify if a shape has been correctly reflected?

• By measuring the distance between points

• By ensuring the new shape matches the pre-image

• By checking if the new shape is larger

• By comparing the angles of the shapes