A pair of straight lines can be parallel lines or perpendicular lines or neither. Two lines are said to be parallel when their slopes are equal. Two parallel lines never intersect each other. On the other hand two lines are perpendicular when the product of their slopes is equal to 1. Two perpendicular lines intersect only once and at right angles. So when you are given two lines and asked to find if they are parallel or perpendicular lines, first compute the slope of the lines. Identify two points on a line to compute its slope. The slope of a line is the ratio of the difference of the y coordinates to the difference of the x coordinates. If the slope of the two lines is equal, then they are parallel lines. In case the product of the lines is equal to 1, they are perpendicular lines. This video shows how to identify parallel and perpendicular lines.
 Hot
 Latest

How To: Remember "greater than" & "less than" symbols

How To: Find the formula of a given sequence

How To: Solve equations with fractions and decimals

How To: Find the Percent Given Two Numbers

How To: Find a missing side of a triangle, similar to another

How To: Understand the differences / similarities between squares, rectangles & rhombi

How To: Evaluate functions by substituting in the variable to the input given

How To: Understand basic probability with examples

How To: Calculate Faster Than a Calculator

How To: Convert Fahrenheit to Celsius with a formula

How To: Calculate the area of a parallelogram

How To: Find the Radius of a Circle from Arc Length

How To: Find the slope of a line given 2 points with fractions

How To: Find the area & perimeter of triangles & squares

How To: Determine the age of a fossil using carbon14

How To: Multiply proper & improper fractions

How To: Find the area of an oblique triangle using formulas

How To: Derive the area of a circle

How To: Calculate probability in "at least one" problems

How To: Find how many toothpicks will be needed to form the nth figure in a sequence

How To: Remember "greater than" & "less than" symbols

How To: Find the formula of a given sequence

How To: Solve equations with fractions and decimals

How To: Find the Percent Given Two Numbers

How To: Find a missing side of a triangle, similar to another

How To: Understand the differences / similarities between squares, rectangles & rhombi

How To: Evaluate functions by substituting in the variable to the input given

How To: Understand basic probability with examples

How To: Calculate Faster Than a Calculator

How To: Convert Fahrenheit to Celsius with a formula

How To: Calculate the area of a parallelogram

How To: Find the Radius of a Circle from Arc Length

How To: Find the slope of a line given 2 points with fractions

How To: Find the area & perimeter of triangles & squares

How To: Determine the age of a fossil using carbon14

How To: Multiply proper & improper fractions

How To: Find the area of an oblique triangle using formulas

How To: Derive the area of a circle

How To: Calculate probability in "at least one" problems

How To: Find how many toothpicks will be needed to form the nth figure in a sequence
Be the First to Comment
Share Your Thoughts