Question

Which of the following best describes perpendicular lines

a. lines that are coplanar and do not intersect
b. lines that meet at a 90 angle
c. lines that meet at a 45 angle
d. lines that are not in the same plane ​

Answer 1

B.

Explanation:

Perpendicular lines always intercept at a right angle (90 degrees).

Answer 2

b. lines that meet at a 90 angle

Explanation:

Perpendicular lines are lines that intersect at a right (90 degrees) angle.

So, the correct answer is b. lines that meet at a 90 angle.

If you want to know if two equations are perpendicular, take their slopes. The slopes of perpendicular lines are opposite reciprocals of each other.