Measuring Angles with a Protractor

Mr. Dallas introduces the concept of measuring angles using a protractor. He explains the structure of a protractor, how to align it with the vertex of an angle, and how to read the measurement. The video demonstrates measuring angles of 80, 125, and 22 degrees, emphasizing the importance of starting at zero and aligning the protractor correctly.

What is the main purpose of this video?

• To learn about different types of angles

• To practice drawing angles

• To understand how to use a protractor to measure angles

• To learn about the history of protractors

Tags

CCSS.4.MD.C.6

Where does the protractor start counting from on both sides?

• 10

• 0

• 90

• 180

What is the point called where the two rays of an angle meet?

• Corner

• Intersection

• Apex

• Vertex

Tags

CCSS.4.MD.C.6

What should you align with the vertex of the angle when using a protractor?

• The center of the protractor

• The left side of the protractor

• The right side of the protractor

• The open part of the protractor

Tags

CCSS.4.MD.C.6

When measuring an angle, where should you start counting from?

• 0

• 10

• 90

• 180

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

What is the measure of the angle if it goes from 0 to 80 degrees?

• 80 degrees

• 100 degrees

• 60 degrees

• 90 degrees

Tags

CCSS.4.MD.C.6

How do you ensure accurate measurement of an angle using a protractor?

• Align the protractor with the top of the angle

• Align the protractor with the bottom of the angle

• Align the protractor with one side of the angle

• Align the protractor with both sides of the angle

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

What is the measure of the angle if it goes from 0 to 125 degrees?

• 100 degrees

• 125 degrees

• 150 degrees

• 175 degrees

Tags

CCSS.4.MD.C.6

What should you avoid doing when measuring an angle with a protractor?

• Aligning the protractor with the vertex

• Matching the wrong sides of the angle

• Starting at zero

• Matching the sides of the angle with the protractor

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

What is the measure of the angle if it goes from 0 to 22 degrees?

• 22 degrees

• 25 degrees

• 30 degrees

• 20 degrees

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1