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Primary 4 Mathematics · Chapter 7 · Practice sheet

Lesson 7.1: Recall: Acute, Right and Obtuse Angles

Name:Date:Marks:    / 15

Section A · Multiple choice 4 marks

1. What kind of angle is shown?1 mark

(A) a right angle(B) an acute angle(C) an obtuse angle(D) a straight line

2. What kind of angle is shown?1 mark

(A) an acute angle(B) a right angle(C) an obtuse angle(D) a straight line

3. A right angle is the same as a turn of1 mark

(A) a half turn(B) three-quarters of a turn(C) a full turn(D) a quarter turn

4. Which angle is the biggest?1 mark

Angle XAngle YAngle Z
(A) Angle Y(B) Angle X(C) Angle Z(D) They are all the same

Section B · Write your answer 11 marks

5. Is an angle of 150° acute, right or obtuse?1 mark

6. How many right angles make a half turn?1 mark

7. How many right angles does a rectangle have?1 mark

8. The minute hand of a clock moves from 12 to 3. How many degrees does it turn?1 mark

9. Write the numbers of the obtuse angles.1 mark

1234

10. Write acute, right or obtuse for each angle: X, Y and Z.2 marks

Angle XAngle YAngle Z

11. The minute hand of a clock moves from 12 to 3 and then from 3 to 6. How many degrees has it turned altogether? What turn is this?2 marks

12. Write these angles in order, from the smallest to the biggest: 130°, 45°, 90°, 170°. Which of them are obtuse angles?2 marks

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