Understanding Protractors: A Quiz on Angle Measurement

What is the main topic covered in this video?

• How to solve algebraic equations

• How to read a protractor

• How to calculate area

• How to draw geometric shapes

When reading an obtuse angle, which number should you choose if the arm passes through 30° and 150°?

• 90°

• 60°

• 30°

• 150°

What do the smallest tick marks on a protractor represent?

• 15° increments

• 1° increments

• 5° increments

• 10° increments

How do you determine which set of numbers to use on a protractor when measuring an acute angle?

• Use the numbers closest to the angle

• Use the outside numbers

• Use both sets of numbers

• Use the inside numbers

What is the purpose of the tick marks that count by 5 on a protractor?

• To provide a more precise measurement

• To mark the center of the protractor

• To indicate the baseline

• To measure angles in radians

Which angle type is always less than 90°?

• Obtuse

• Acute

• Right

• Reflex

In the third example, what is the measurement of the obtuse angle?

• 70°

• 120°

• 115°

• 60°

For an angle slightly greater than 90°, which numbers should you use on the protractor?

• Neither, use a different tool

• Both inside and outside numbers

• Outside numbers

• Inside numbers

What is the measurement of the angle in the final example?

• 97°

• 90°

• 95°

• 100°

What should you do if the angle is not on a 10° or 5° mark?

• Ignore the measurement

• Round to the nearest 10°

• Use the 1° tick marks

• Estimate the angle