Review for 8th grade Illustrative Math End-Of-Unit #1 test

Front

What is a transformation in geometry?

Back

A transformation in geometry refers to the movement of a figure in a plane. This can include translations, rotations, reflections, and dilations.

Front

What is a translation?

Back

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

Front

How do you describe a translation?

Back

A translation can be described by specifying the direction and distance each point moves, such as 'up 1 unit and right 2 units'.

Front

What are interior angles?

Back

Interior angles are the angles formed inside a polygon by its sides.

Front

How do you find the measure of an interior 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 degrees.

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a figure around a fixed point, known as the center of rotation.

Front

What does it mean to rotate a figure 180 degrees?

Back

Rotating a figure 180 degrees means turning it halfway around a point, resulting in a figure that is upside down.

Front

What is the center of rotation?

Back

The center of rotation is the fixed point around which a figure is rotated.

Front

How can you determine if two line segments can be rotated to match each other?

Back

Two line segments can be rotated to match each other if they are of equal length and can be aligned through a rotation around a point.

Front

What is the result of rotating a point 180 degrees around another point?

Back

The result of rotating a point 180 degrees around another point is a new point that is directly opposite the original point, at an equal distance from the center of rotation.