Reflections geometry

Front

What happens to the coordinates of a point when it is reflected across the x-axis?

Back

The y-coordinate of the point changes sign, while the x-coordinate remains the same.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What happens to the coordinates of a point when it is reflected across the y-axis?

Back

The x-coordinate of the point changes sign, while the y-coordinate remains the same.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If point A is at (x, y), what are the coordinates of A' after reflection across the x-axis?

Back

A' will be at (x, -y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If point B is at (x, y), what are the coordinates of B' after reflection across the y-axis?

Back

B' will be at (-x, y).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the reflection of the point (4, 5) across the x-axis?

Back

The reflection is (4, -5).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the reflection of the point (-3, 2) across the y-axis?

Back

The reflection is (3, 2).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

How do you determine if a shape is reflected over the x-axis or y-axis?

Back

Check the signs of the coordinates of the reflected points compared to the original points.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If a triangle has vertices at (1, 2), (3, 4), and (5, 6), what are the coordinates after reflecting across the x-axis?

Back

The new vertices will be (1, -2), (3, -4), and (5, -6).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the result of reflecting the point (0, 0) across any axis?

Back

The result is still (0, 0) because it is the origin.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

If point C is at (2, -3), what are the coordinates of C' after reflection across the y-axis?

Back

C' will be at (-2, -3).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5