Math 8 Trimester 1 Benchmark Review

Front

What happens to the coordinates of a point when it is reflected across the x-axis?

Back

The y-coordinate changes sign, while the x-coordinate remains the same.

Front

What is the result of rotating a shape 90 degrees clockwise?

Back

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

Front

How do you translate a shape on a coordinate plane?

Back

To translate a shape, you add or subtract values from the x and y coordinates of each point.

Front

What is the formula to solve the equation 3(x - 2) = 18?

Back

First, distribute: 3x - 6 = 18. Then, add 6 to both sides: 3x = 24. Finally, divide by 3: x = 8.

Front

What is a trapezoid?

Back

A trapezoid is a four-sided figure (quadrilateral) with at least one pair of parallel sides.

Front

What does it mean to reflect a shape?

Back

To reflect a shape means to create a mirror image of it across a line, such as the x-axis or y-axis.

Front

What is the difference between rotation and reflection in geometry?

Back

Rotation turns a shape around a point, while reflection flips it over a line.

Front

How do you determine the angle of rotation for a figure?

Back

The angle of rotation is the measure of the turn from the original position to the new position, usually measured in degrees.

Front

What is the coordinate of point I' if point I is (6, -2) after reflection across the x-axis?

Back

The coordinates of I' would be (6, 2).

Front

What does it mean to translate a shape 5 units down and 5 units to the right?

Back

To translate a shape 5 units down, subtract 5 from the y-coordinate; to translate 5 units to the right, add 5 to the x-coordinate.