Math Enrichment-Exam Review #3

Front

What is the result of rotating a point (x, y) 90° counterclockwise about the origin?

Back

The new coordinates will be (-y, x).

Front

What is the measure of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180°.

Front

How do you calculate the mean of a set of numbers?

Back

Add all the numbers together and divide by the total count of numbers.

Front

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

Back

The new coordinates will be (x, -y).

Front

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

Back

The new coordinates will be (-x, y).

Front

If a point is reflected across the line y = x, what is the new coordinate of the point (x, y)?

Back

The new coordinates will be (y, x).

Front

What is the formula for finding the distance between two points (x1, y1) and (x2, y2)?

Back

Distance = √((x2 - x1)² + (y2 - y1)²).

Front

What is the definition of a mean in statistics?

Back

The mean is the average of a set of numbers, calculated by dividing the sum of the numbers by the count of numbers.

Front

What is the relationship between complementary angles?

Back

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

Front

What is the relationship between supplementary angles?

Back

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