8th Grade KPREP Review

Front

What is the formula to find the length of a missing side in a right triangle?

Back

Use the Pythagorean theorem: a² + b² = c², where c is the hypotenuse.

Front

What does the slope of a line represent?

Back

The slope represents the rate of change of y with respect to x, indicating the steepness and direction of the line.

Front

What is an irrational number? Give an example.

Back

An irrational number cannot be expressed as a fraction of two integers. Example: √45.

Front

What is a function in mathematics?

Back

A function is a relation where each input has exactly one output.

Front

How do you determine if a set of values is a function?

Back

Check if any x-value is repeated with different y-values.

Front

What is the distance formula in a coordinate plane?

Back

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

Front

What is the definition of a diagonal in geometry?

Back

A diagonal is a line segment that connects two non-adjacent vertices of a polygon.

Front

What is the significance of an undefined slope?

Back

An undefined slope indicates a vertical line, where x does not change.

Front

What does a slope of 0 indicate about a line?

Back

A slope of 0 indicates a horizontal line, where y does not change.

Front

What is the relationship between the sides of a right triangle?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.