Geometry Flashcard

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

How can you verify that angles in a quadrilateral are right angles?

Back

You can measure opposite sides to ensure they are equal, which confirms that the angles are right angles.

Front

What happens to the coordinates of a point when it is rotated 90° counterclockwise?

Back

The coordinates (x, y) become (-y, x).

Front

What is the relationship between corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal when two parallel lines are cut by a transversal.

Front

What is the definition of congruent angles?

Back

Congruent angles are angles that have the same measure.

Front

What is the result of rotating a shape 180° about the origin?

Back

The coordinates of each point (x, y) become (-x, -y).

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that lie between two lines and on opposite sides of a transversal.

Front

What is the significance of measuring sides in a quadrilateral?

Back

Measuring sides helps determine the type of quadrilateral and verify properties like right angles.

Front

What is the definition of a quadrilateral?

Back

A quadrilateral is a polygon with four sides and four angles.

Front

How do you determine if two angles are supplementary?

Back

Two angles are supplementary if the sum of their measures is 180 degrees.