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Maths · Grade 4 · Set A
A turn, cut into 360
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Remember: A full turn is 360 degrees. Cut it into equal turns: a quarter turn is 90 degrees and a half turn is 180 degrees.

Fractions of a turn

1
The shaded part of the circle is a turn. Which turn is it?
a half turna full turna quarter turn
2
A full turn goes all the way round. How many degrees is a full turn?
3
The shaded part is a half turn. How many degrees is it?
4
Which picture shows a turn of 90 degrees?
A
B
C
5
Three of the four equal turns are shaded. How many degrees is the shaded turn?
6
Join each turn to its degrees.
  1. 1a quarter turn
  2. 2a half turn
  3. 3a three-quarter turn
  4. 4a full turn
  • A90 degrees
  • B180 degrees
  • C270 degrees
  • D360 degrees

Cutting and joining turns

7
A circle is cut into 10 equal turns. One turn is shaded. How many degrees is it?
8
A circle is cut into 12 equal turns, like a clock face. How many degrees is one turn?
9
Two angles are put side by side. One is 60 degrees and one is 30 degrees. How many degrees in all?
10
A 30 degree turn and a 150 degree turn together make a half turn.
TrueFalse
11
The shaded turn is 320 degrees. How many more degrees finish the full turn?
12
A full turn is 180 degrees.
TrueFalse
13
Write how you know a quarter turn is 90 degrees.
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Answer key · Set A
A turn, cut into 360
1a quarter turn The circle is cut into 4 equal turns and 1 is shaded, so it is a quarter turn.
2360 A full turn is 360 degrees.
3180 A half turn is half of 360 degrees, which is 180 degrees.
4B 90 degrees is a quarter turn, 1 part of 4 equal parts. Picture A is 180 degrees and picture C is 270.
5270 Each quarter turn is 90 degrees, and 90 + 90 + 90 = 270.
61-A, 2-B, 3-C, 4-D
736 360 split into 10 equal turns is 36 degrees each.
830 360 split into 12 equal turns is 30 degrees each.
990 Turns add up: 60 + 30 = 90 degrees.
10True 30 + 150 = 180, and 180 degrees is a half turn.
1140 A full turn is 360 degrees, and 360 − 320 = 40.
12False A full turn is 360 degrees. 180 degrees is only a half turn.
13Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.