Understanding angles · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Understanding angles

Mathematics · Geometry · ages 7-8
Name ______________________   Date ____________

  1. The clock hand starts at 12 and moves round to 3. What is this turn called?

    121234567891011
    • half turn
    • quarter turn
    • full turn

  2. The clock hand moves from 12 round to 3. What does the angle it makes look like?

    • a square corner
    • a sharp pointy corner
    • a round curvy corner

  3. You turn a quarter turn clockwise, then a quarter turn anti-clockwise. How many quarter-turn moves have you made, counting both directions?

    Answer: ______________

  4. How many angles does a pentagon have?

    • 3
    • 4
    • 5

  5. You face the door. You turn a half turn clockwise. Which way are you facing now, compared to where you started?

    • The same way as you started
    • The opposite way from your start
    • One quarter turn from your start

  6. Count the corners on this shape. How many angles does it have?

    Answer: ______________

  7. Which clock hand move shows a half turn?

    • from 12 to 6
    • from 12 to 3
    • from 12 all the way back to 12

  8. Which list puts the turns in order from smallest to biggest?

    • tiny turn, quarter turn, half turn
    • quarter turn, tiny turn, half turn
    • half turn, quarter turn, tiny turn

  9. Jack says a closed book has no angles because it is flat. Is he right?

    • Yes, closed books have no angles
    • No, the corners of the pages still make angles
    • No, but only if the book is open

  10. A big heavy door and a small light door both turn the same amount from closed. Ben says the big door makes a bigger angle. Is he right?

    Circle one:   True   False

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Answer key

For grown-ups. Fold this page away before handing over the rest.

Understanding angles W1-mt_8OAGVdeTJ_-s1

  1. quarter turn · From 12 round to 3 is a quarter of the way around the clock, so it is a quarter turn.
  2. a square corner · From 12 to 3 is a quarter turn, and a quarter turn makes a square corner angle.
  3. 2 · You made two quarter-turn moves: one clockwise and one anti-clockwise. Counting both directions, that is 2 moves.
  4. 5 · A pentagon has five corners, and each corner is an angle.
  5. The opposite way from your start · A half turn is two quarter turns. Two quarter turns clockwise faces you the opposite way from your start.
  6. 4 · Each corner of the square is an angle, and a square has four corners.
  7. from 12 to 6 · A half turn goes halfway around the clock, from 12 down to 6.
  8. tiny turn, quarter turn, half turn · A tiny turn moves the least, a quarter turn goes further, and a half turn goes further still.
  9. No, the corners of the pages still make angles · Even closed, the corners of the book's pages still meet at a point, so they still make angles.
  10. False · The angle tells you how far something has turned, not how big the thing is. Both doors turned the same amount, so their angles are the same.
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