Measuring Angles with a Protractor

The video tutorial introduces the concept of measuring angles, focusing on the fourth-grade standard 4.7c in Texas. It uses a protractor to measure angles and explains the differences between acute, right, and obtuse angles. The tutorial guides students through identifying angles using a protractor and calculating angles by subtraction to find the correct answer, emphasizing the importance of understanding angle types and measurements.

What tool is used to measure the space between two lines forming an angle?

• Ruler

• Caliper

• Compass

• Protractor

Tags

CCSS.4.MD.C.6

What is the degree measure of a right angle?

• 30 degrees

• 45 degrees

• 90 degrees

• 180 degrees

Tags

CCSS.4.G.A.1

Which type of angle is less than 90 degrees?

• Right

• Straight

• Acute

• Obtuse

Tags

CCSS.4.G.A.1

If an angle measures 150 degrees, what type of angle is it?

• Obtuse

• Acute

• Right

• Reflex

Tags

CCSS.4.G.A.1

How do you determine the measurement of an angle using a protractor starting from zero?

• Multiply the readings

• Subtract the readings

• Add the readings

• Divide the readings

Tags

CCSS.4.MD.C.6

Which angle measurement is closest to 30 degrees?

• 30 degrees

• 60 degrees

• 120 degrees

• 90 degrees

Tags

CCSS.4.G.A.1

What is the correct way to measure an angle from 90 to 150 degrees using a protractor?

• None of the above

• Multiply 90 by 150

• Add 90 and 150

• Subtract 90 from 150

Tags

CCSS.4.MD.C.6

Which of the following is not a correct match of angle type to its degree range?

• Acute - less than 90 degrees

• Right - 90 degrees

• Obtuse - more than 90 degrees

• Acute - more than 90 degrees

Tags

CCSS.4.G.A.1

What is the degree measure of an angle that starts at 60 and ends at 90 on a protractor?

• 90 degrees

• 30 degrees

• 150 degrees

• 60 degrees

Tags

CCSS.4.MD.C.6

Which option correctly identifies the angle type for 150 degrees?

• Straight

• Acute

• Right

• Obtuse

Tags

CCSS.4.G.A.1