Understanding Supplementary Angles

The video tutorial explains supplementary angles, which are pairs of angles that add up to 180 degrees. It provides multiple examples of solving equations to find the value of Y, demonstrating algebraic techniques and inverse operations. The tutorial covers different scenarios, including proportional angles and more complex equations, and concludes with a summary of the key concepts and methods discussed.

What is the sum of supplementary angles?

• 180 degrees

• 270 degrees

• 90 degrees

• 360 degrees

Tags

CCSS.7.G.B.5

If angle 3 is 2y and angle 4 is 3y - 15, what is the value of y when they are supplementary?

• 39

• 45

• 30

• 50

Tags

CCSS.7.G.B.5

In the first example, what is the measure of angle 3 when y is 39?

• 78

• 39

• 117

• 90

Tags

CCSS.7.G.B.5

For the second example, if angle 3 is y + 10 and angle 4 is 3y - 10, what is y?

• 50

• 40

• 30

• 45

Tags

CCSS.7.G.B.5

What is the measure of angle 4 in the second example when y is 45?

• 115

• 135

• 125

• 145

Tags

CCSS.7.G.B.5

In the third example, if angle 3 is 5 times angle 4, what is the value of y?

• 35

• 30

• 25

• 40

Tags

CCSS.7.G.B.5

What is the measure of angle 3 in the third example when y is 30?

• 120

• 150

• 90

• 180

Tags

CCSS.7.G.B.5

In the final example, if angle 3 is 160 - y and angle 4 is 170 - y, what is y?

• 125

• 140

• 130

• 135

Tags

CCSS.7.G.B.5

What is the sum of angles 3 and 4 in the final example when y is 125?

• 200

• 175

• 180

• 150

Tags

CCSS.7.G.B.5

What is the definition of supplementary angles?

• Angles that add up to 90 degrees

• Angles that are equal

• Angles that add up to 360 degrees

• Angles that add up to 180 degrees

Tags

CCSS.7.G.B.5