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Maths · Grade 4 · Set A
The folding line
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Goal: 15 min
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Remember: A fold line makes two halves that match exactly. A shape that has a fold line has a line of symmetry. Equal sides are not needed, but matching halves are.

Do the halves match?

1
Do the two halves match when you fold on the dashed line?
YesNo
2
Do the halves match when you fold this rectangle on the dashed line?
YesNo
3
When you fold this triangle on the dashed line, do the halves match?
YesNo
4
Which picture shows a dashed line that makes matching halves?
A
B
C
5
How many lines of symmetry does a square have?
6
This rectangle is not a square. How many lines of symmetry does it have?

Lines of symmetry

7
An equilateral triangle has 3 equal sides. How many lines of symmetry does it have?
8
A trapezoid with two equal slanted sides has a line of symmetry.
TrueFalse
9
This parallelogram has a line of symmetry.
TrueFalse
10
This triangle has three different side lengths. Does it have a line of symmetry?
YesNo
11
Put the shapes in order from the fewest lines of symmetry to the most.
  • parallelogram
  • rectangle
  • square
  • heart
12
Join each shape to its lines of symmetry.
  1. 1heart
  2. 2rectangle (not a square)
  3. 3equilateral triangle
  4. 4square
  • A1 line
  • B3 lines
  • C4 lines
  • D2 lines
13
Draw a shape that has a line of symmetry. Draw the fold line on it with a dashed line.
14
How can you check that a dashed line is a fold line? Write what you would do.
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