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 π‘šβˆ π΅π΄πΆ?

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 π‘šβˆ π΅π΄πΆ 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 >: π‘šβˆ π΄π΅πΆπ‘šβˆ π‘‹π‘Œπ‘.

  • A=
  • B>
  • C<

Q8:

What is π‘šβˆ π΅π΄πΆ?

Q9:

What is π‘šβˆ πΉπ΄πΈ?

Q10:

Read off π‘šβˆ π΅π΄πΆ from the figure below.

Q11:

The measure of a right angle is .

Q12:

Is an angle of 140∘ 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 90∘
  • Bless than 90∘
  • C90∘

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 90∘
  • Bmore than 90∘ and less than 180∘
  • C90∘

Q22:

Which of these angles is obtuse?

  • A(e)
  • B(b)
  • C(d)
  • D(a)
  • E(b)

Q23:

What kind of angle is 155∘?

  • 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 .

  • A270∘, 360∘
  • B90∘, 180∘
  • C90∘, 0∘
  • D180∘, 270∘

Q25:

What is the measure of a zero angle?

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