Parallel & Perpendicular Slopes FLASHCARD

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope.

Front

What is the definition of perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees). The slopes of perpendicular lines are negative reciprocals of each other.

Front

If two lines have slopes of m = 2 and m = 2, what can be said about these lines?

Back

The lines are parallel.

Front

If two lines have slopes of m = 4 and m = -1/4, what can be said about these lines?

Back

The lines are perpendicular.

Front

What is the slope of a line that is horizontal?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a line that is vertical?

Back

The slope of a vertical line is undefined.

Front

Given the equation y = 2x + 1, what is the slope?

Back

The slope is 2.

Front

Given the equation y = -3x + 4, what is the slope?

Back

The slope is -3.

Front

If Line A has a slope of 1/2, what is the slope of a line that is perpendicular to Line A?

Back

The slope of the perpendicular line is -2.

Front

What is the relationship between the slopes of two parallel lines?

Back

The slopes of two parallel lines are equal.