Unit 2B Midterm Review

Front

What is the image of point (4,2) after the composition of transformations defined by R₉₀ o r_y=x?

Back

(-4, 2)

Front

Choose the correct transformation: (x, y) ----- (x + a, y)

Back

Translation right

Front

What is the rule for the reflection across y = -x?

Back

Reflection across y = -x

Front

Identify the transformation: (x, y) ----- (x - 5, y + 1)

Back

Translation 5 units left, 1 unit up.

Front

What are the coordinates of point A', the image of point A(-4, 1), after the composite transformation R₉₀ o r_y=x?

Back

(4, 1)

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way to produce a new shape.

Front

What does R₉₀ represent in transformations?

Back

R₉₀ represents a 90-degree rotation counterclockwise around the origin.

Front

What is the effect of reflecting a point across the x-axis?

Back

The y-coordinate of the point changes sign.

Front

What is the effect of reflecting a point across the y-axis?

Back

The x-coordinate of the point changes sign.

Front

What is the transformation rule for a translation?

Back

(x, y) ----- (x + a, y + b), where a and b are the horizontal and vertical shifts.