Cumulative Flashcard #1 REVIEW

Front

What is a scale factor in transformations?

Back

A scale factor is a number that scales, or multiplies, a quantity. In transformations, it determines how much a figure is enlarged or reduced.

Front

What is the rule for rotating a figure 270 degrees counterclockwise?

Back

The rule for rotating a figure 270 degrees counterclockwise is (y, -x).

Front

What is a translation in geometry?

Back

A translation is a transformation that moves every point of a figure the same distance in the same direction.

Front

How do you identify lines of symmetry in a shape?

Back

Lines of symmetry are lines that divide a shape into two identical parts that are mirror images of each other.

Front

What is dilation in geometry?

Back

Dilation is a transformation that alters the size of a figure but not its shape, using a scale factor.

Front

How do you perform a reflection across the y-axis?

Back

To reflect a point (x, y) across the y-axis, the new coordinates will be (-x, y).

Front

What is the effect of a scale factor of 2 on a point (x, y)?

Back

A scale factor of 2 will transform the point (x, y) to (2x, 2y), effectively doubling its distance from the origin.

Front

What does a 90-degree rotation counterclockwise do to a point (x, y)?

Back

A 90-degree rotation counterclockwise transforms the point (x, y) to (-y, x).

Front

How do you translate a point 5 units left and 1 unit up?

Back

To translate a point (x, y) 5 units left and 1 unit up, the new coordinates will be (x-5, y+1).

Front

What is the formula for finding the number of lines of symmetry in regular polygons?

Back

The number of lines of symmetry in a regular polygon is equal to the number of sides it has.