Reflections Across the X and Y Axes

The video tutorial explains the concept of reflections in geometry, starting with the idea of mirror images, such as the reversed writing on ambulances. It covers the properties of reflections, including that they do not change size or shape. The tutorial details common lines of reflection, such as the x-axis, y-axis, and lines like y=x. It provides examples of reflecting points, line segments, and figures over these lines, explaining the rules and transformations involved. The video concludes with a summary of reflection rules and encourages viewers to explore more content.

Why is the word 'AMBULANCE' written in reverse on vehicles?

• Because of a printing error

• To make it easier to read in the rearview mirror

• To make it look unique

• It's an international standard without specific reason

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CCSS.RI.7.8

CCSS.RI.8.1

CCSS.RI.8.8

CCSS.RL.8.1

CCSS.RL.9-10.1

What does a reflection in geometry not change?

• Shape

• Color

• Size

• Position

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What does the lowercase 'R' notation in geometry signify?

• Repositioning

• Reduction

• Rotation

• Reflection

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Which line of symmetry is represented by the equation x = K?

• A curved line

• A vertical line

• A horizontal line

• A diagonal line

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CCSS.4.G.A.3

What happens to the y-coordinate when a point is reflected over the x-axis?

• It becomes zero

• It is doubled

• It is negated

• It remains unchanged

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

When reflecting a point over the y-axis, what happens to the x-coordinate?

• It is negated

• It remains unchanged

• It is squared

• It is halved

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

How do you find the coordinates of a reflected line segment over a vertical line?

• By negating the y-coordinates

• By counting units from the line of symmetry

• By doubling the x-coordinates

• By swapping the x and y coordinates

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What happens to a point that lies directly on the line of symmetry during reflection?

• Its coordinates are swapped

• It remains in the same position

• Its coordinates are negated

• It moves to the opposite side of the line

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CCSS.4.G.A.3

What is the result of reflecting a point over the line y = x?

• The y-coordinate is doubled

• The x and y coordinates are negated

• The x-coordinate becomes zero

• The x and y coordinates are swapped

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What is true about reflecting a figure over the line y = -x?

• Only the y-coordinate is negated

• Only the x-coordinate is negated

• The x and y coordinates are swapped and negated

• The figure is rotated 90 degrees

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CCSS.8.G.A.3

CCSS.HSG.CO.A.5