38 videos in "Angles"

Angles

Exploring Angle Relationships

Angle Relationships

Finding Supplementary Angles

Using angle measures and relationships to solve for variables

Solving for angle measures in a quadrilateral

Finding angles in a trapezoid

Angles Part 1 Intro

Angles Part 2

Angles Part 3

Angles Part 4

Finding Coterminal Angles

Angle Bisectors and Solving for an Angle

Vertical Angles and Solving for an Angle

Finding the Value of x using Supplementary Angles

Finding Angle Measures using Corresponding and Supplementary Angles

Solving for x using Two Parallel Lines and a Transversal

Finding the Value of x using Alternate Interior Angles

Finding the Value of Trapezoid Interior Angles

Identifying Acute, Straight, and Obtuse Angles

Using Sum of Angles to Find N

Modeling an Angle with an Equation

Finding an Angle from an Equation

Classifying Angles in a Diagram

Solve for Angle in Diagram

Find Missing Angle in Diagram

Using Complementary Angles to Find Missing Value

Solve for Angle Measures in Diagram

Solve for Angle Measures in Diagram

Solve for Angle Measures in Diagram

Converting Angle from Minutes and Seconds to Decimals

Finding Complement and Supplement of 2 Angles

Converting Angle from Minutes and Seconds to Decimals

Finding Coterminal Angles for a Given Angle

Converting Angle from Minutes and Seconds to Degrees

Determine Whether Two Lines are Parallel

Determine Whether Two Lines are Parallel

Using Angles to Solve For Measures of Two Angles
Finding Supplementary Angles
 What are supplementary angles?
 How can you find supplementary angles?
 How do you find the measures of angles x and y if the measure of angle x is threefifths the measure of angle y and if x and y are supplementary angles?
 What is the clearing fraction approach?
 How do you solve 3/5 y + y = 180?
 How do you solve 3y + 5y = 900?
This lesson uses a geometric angle situation to set up and solve an algebraic equation to find the measures of the two angles. This is a good beginner problem if you are just learning to relate algebra equations to geometric situations.