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Grade 3 - Mathematics
8.9 Congruent and Symmetric Figures
When two figures are exactly the same, they are said to be congruent.
When a figure can be folded into equal pieces, then it is said to be symmetric.
The line along which the figure is folded is called the line of symmetry.
: How many lines of symmetry does this figure have?
Answer the following. Also draw at least five symmetric figures and show their line of symmetry.
: Are the two triangles in the figure congruent?
: How many lines of symmetry does a circle have?
more than you can count
: In a symmetrical figure the folded line is called
the line of symmetry
: These two figers are congruent.
: 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)
: When a figure can be folded in half and both halves match the figure is said to be
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