# Lesson Worksheet: Measuring Angles Mathematics • 4th Grade

In this worksheet, we will practice measuring angles in degrees using a protractor and estimating the sizes of angles.

Q1:

What is ? Q2:

What is measured using a protractor?

• Aangles
• Blength
• Cweight

Q3:

Which of the following statements correctly defines an angle?

• AAn angle is the figure formed by two rays with a common end point.
• BAn angle is the part of a straight line beginning at a given point and extending in one direction to a predetermined length.
• CAn angle is the part of a line that connects two points.
• DAn angle is the part of a straight line beginning at a given point and extending limitlessly in one direction.
• EAn angle is the point where two rays intersect.

Q4:

Which of these is a unit used to measure an angle?

• AGrams
• BDegrees
• CMeters
• DCentimeters

Q5:

Read off from the figure below. Q6:

Jacob and Mia are measuring angles. Which of the two is correct? • AJacob
• BMia

Q7:

Complete the following using , , or : . • A
• B
• C

Q8:

What is ? Q9:

What is ? Q10:

Read off from the figure below. Q11:

The measure of a right angle is .

Q12:

Is an angle of obtuse, acute, or a right angle?

• Aright angle
• Bobtuse
• Cacute

Q13:

Determine whether the angle shown is acute, right, or obtuse. • Aright
• Bacute
• Cobtuse

Q14:

Complete the following statement: The sum of two acute angles is an obtuse angle.

• Aalways
• Bsometimes
• Cnever

Q15:

The measure of an acute angle is .

• Amore than
• Bless than
• C

Q16:

What is the measure of a straight angle?

Q17:

Fill in the blank using greater than, equal to, or less than: The measure of a right angle is the measure of an acute angle.

• Aless than
• Bequal to
• Cgreater than

Q18:

Is the measure of a right angle less than, greater than, or equal to the measure of an obtuse angle?

• AGreater than
• BLess than
• CEqual to

Q19:

What is the size of a right-angle?

Q20:

Use , , or to complete the following: The measure of a straight angle the measure of an obtuse angle.

• A
• B
• C

Q21:

What is the size of an obtuse angle?

• Aless than
• Bmore than and less than
• C

Q22:

Which of these angles is obtuse? • A(e)
• B(b)
• C(d)
• D(a)
• E(b)

Q23:

What kind of angle is ?

• Astraight angle
• Breflex angle
• Cright angle
• Dobtuse angle
• Eacute angle

Q24:

An acute angle is an angle whose measure is less than and more than .

• A,
• B,
• C,
• D,

Q25:

What is the measure of a zero angle?