Math 8 - Chapter 2 Test Review

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way to create a new shape. Common transformations include translation, rotation, reflection, and dilation.

Front

Define translation in geometry.

Back

Translation is a type of transformation that slides a shape from one position to another without turning it. The shape remains congruent to the original.

Front

What does it mean to reflect a shape across the x-axis?

Back

Reflecting a shape across the x-axis means flipping the shape over the x-axis, resulting in a mirror image where the y-coordinates of the points change sign.

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a shape around a fixed point, known as the center of rotation, by a certain angle.

Front

How do you determine the angle of rotation?

Back

The angle of rotation is measured in degrees and indicates how far the shape is turned around the center of rotation.

Front

What is the difference between clockwise and counterclockwise rotation?

Back

Clockwise rotation turns the shape in the direction of the hands of a clock, while counterclockwise rotation turns it in the opposite direction.

Front

What is the line of reflection?

Back

The line of reflection is the line over which a shape is reflected to create a mirror image. Points on the shape are equidistant from the line.

Front

How do you find the measure of an angle in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees. You can find the measure of an unknown angle by subtracting the sum of the known angles from 180.

Front

What is the relationship between complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

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