Primary School · Mathematics

Angle (degree): Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Angle (degree).

10 questions21 marksFree, no account

Question 1

1 mark

Which of the following is the unit used to measure the size of an angle?

Question 2

1 mark

In the figure, \(∠AOB\) is a straight angle. If \(∠AOC = 55^{\circ}\), find the size of \(∠COB\).

Question 3

1 mark

In a triangle, if one angle is \(40^{\circ}\) and another angle is \(50^{\circ}\), what is the measure of the third angle?

Question 4

1 mark

What is the size of a round angle in degrees?

Question 5

1 mark

If the sum of two angles is equal to a round angle, and one of the angles is \( 135^{\circ} \), what is the size of the other angle?

Question 6

2 marks

In geometry, how many degrees are there in four right angles added together?

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Question 7

3 marks

In the diagram, points A, O, and B lie on a straight line. If \(\angle AOC\) is a right angle and \(\angle COD = 25^{\circ}\), what is the size of the acute angle \(\angle DOB\)?

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Question 8

5 marks

Point \(O\) is a point on a straight line \(PQ\). If a ray \(OR\) is drawn such that \(\angle POR\) is \(35^\circ\), find the size of the reflex angle \(\angle POR\).

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Question 9

2 marks

Observe the provided figure of a circle with center \(O\).
(a) What is the name of the angle formed by a complete turn around the center?
(b) What is the size of this angle in degrees?

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Question 10

4 marks

In the diagram, three angles meet at a point on a straight line. Angle \(A\) is an acute angle of \(42^{\circ}\). Angle \(B\) is a right angle.
(a) Find the size of the third angle, Angle \(C\).
(b) Is Angle \(C\) an acute, obtuse, or right angle?

Write your answer out first, then check it against the worked solution.

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