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Math 4 · Unit 8: Angles · Cambridge Primary Maths Stage 4

8.2 Acute and obtuse

15 questions · e.g. Is this angle acute or obtuse?

Practice

Questions

  1. 1. Worked example: is this angle acute or obtuse?

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  2. 2. Find the angle words in the word search. Which of these words is hidden in the grid?

    fpmeobtusewzqsmallertvctoacuteswoifrawdauemmeickvvdxpaqgcvznzaatkhajvhkgreaterhggdegreesigvjanglebhn
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  3. 3. Tick the 3 acute angles.

    Tick all the right answers.

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  4. 4. This shape has some acute angle corners and some obtuse angle corners. The top left corner is obtuse. Which labels are right for corners A, B and C?

    obtuseACB
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  5. 5. Which box has five acute angles?

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  6. 6. The numbers in this grid are degrees of turn. Which route goes from the start to the end, only through squares with an obtuse angle, moving up, down, left or right?

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  7. 7. Which triangle has three acute angles?

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  8. 8. Which triangle has a right angle?

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  9. 9. Which triangle has an obtuse angle?

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  10. 10. Which triangle has each angle labelled correctly as 'acute', 'obtuse' or 'right angle'?

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  11. 11. Complete: An ______ angle is between 90 and 180 degrees.

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  12. 12. Complete: An angle of 59 degrees is ______.

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  13. 13. Complete: An ______ angle is smaller than a right angle.

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  14. 14. Complete: An angle of 100 degrees is ______.

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  15. 15. Complete: An ______ angle is between 0 and 90 degrees.

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