Math 8 - Chapter 2 Flashcard #2 Review

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What is the rule for reflecting a point across the y-axis?

Back

The rule is (x, y) -> (-x, y).

Front

What is the rule for translating a point 2 units to the right and 1 unit down?

Back

The rule is (x, y) -> (x + 2, y - 1).

Front

What is a regular polygon?

Back

A regular polygon is a polygon with all sides and angles equal.

Front

How do you calculate the measure of each interior angle of a regular polygon?

Back

Front

What is the sum of the interior angles of a polygon with 5 sides?

Back

Front

What is the definition of alternate exterior angles?

Back

Alternate exterior angles are pairs of angles that lie outside the two lines and on opposite sides of the transversal.

Front

What is the definition of corresponding angles?

Back

Corresponding angles are pairs of angles that are in the same position on two different lines cut by a transversal.

Front

What is the definition of supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is the transformation that moves a figure left or right?

Back

This transformation is called translation.