Front

What are the slopes of perpendicular lines?

Back

The slopes of perpendicular lines are opposite reciprocals.

Front

What are vertical angles?

Back

Vertical angles are angles that are opposite of each other when lines intersect.

Front

What is true about vertical angles?

Back

Vertical angles are always congruent (equal measures).

Front

Which line is parallel to y=3x+1?

Back

y=3x is parallel to y=3x+1.

Front

What does 'm' represent in the equation y=mx+b?

Back

'm' represents the slope.

Front

If the slope of a line is 2, what is the slope of a line perpendicular to it?

Back

The slope of a line perpendicular to it is -1/2.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

How do you find the slope between two points (x1, y1) and (x2, y2)?

Back

The slope is calculated as (y2 - y1) / (x2 - x1).

Front

What is the relationship between parallel lines in terms of slope?

Back

Parallel lines have identical slopes.