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Grade 3 - Mathematics
8.9 Congruent and Symmetric Figures

  1. When two figures are exactly the same, they are said to be congruent.
  2. When a figure can be folded into equal pieces, then it is said to be symmetric.
  3. The line along which the figure is folded is called the line of symmetry.
Example: How many lines of symmetry does this figure have?

Answer: 4


Directions: Answer the following. Also draw at least five symmetric figures and show their line of symmetry.
Q 1: Are the two triangles in the figure congruent?

False
True

Q 2: Are the two triangles in the figure congruent? (hint: sometimes you have to turn the figure around to see if it is congruent with another)

yes
no

Q 3: How many lines of symmetry does a circle have?

more than you can count
90
10
15

Q 4: Two figures that are exactly the same shape and size are said to be
similar
different
congruent

Q 5: How many lines of symmetry does a square have?

4
2
1
3

Q 6: In a symmetrical figure the folded line is called
radius
diameter
the line of symmetry

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Question 8: This question is available to subscribers only!


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