Measuring Angles Accurately with a Protractor

This tutorial demonstrates how to measure angles using a protractor. It covers the use of different scales on the protractor depending on the direction of measurement. The video provides examples of measuring a single angle and angles within a triangle, emphasizing the importance of positioning the protractor correctly. It concludes with a check on the accuracy of angle measurements, highlighting potential human error.

What is the primary purpose of using a protractor in this tutorial?

• To draw perfect circles

• To measure side lengths

• To measure angles accurately

• To create angle designs

Which scale should be used when measuring an angle from the left side of the protractor?

• No scale

• Outside scale

• Inside scale

• Either scale

What is the approximate degree of the angle measured using the inside scale?

• 90 degrees

• 126 degrees

• 100 degrees

• 150 degrees

When aligning the protractor, what is crucial to ensure accuracy?

• The protractor covers the entire angle

• The protractor is completely flat

• The protractor is in a vertical position

• The zero mark is aligned with one side of the angle

What should you do if the protractor is not aligned perfectly?

• Use a different protractor

• Measure the angle as it is

• Adjust the protractor slightly

• Change the angle

What is the degree of angle B as measured in the tutorial?

• 42 degrees

• 126 degrees

• 21 degrees

• 116 degrees

How many degrees does angle A approximately measure?

• 21 degrees

• 116 degrees

• 126 degrees

• 42 degrees

What is the sum of angles A, B, and C as calculated in the tutorial?

• 180 degrees

• 179 degrees

• 182 degrees

• 181 degrees

What is a common error when measuring angles manually?

• Misreading the scale

• Protractor breaking

• Angles summing to exactly 180 degrees

• The protractor slipping

What should the sum of the interior angles of a flat triangle be?

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees