Understand that congruent plane figures remain congruent even if they are in different spatial orientations.
The student will identify and describe congruent and noncongruent plane figures.
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Understand that some figures may have more than one line of symmetry.
Understand that the orientation of figures does not affect congruency or noncongruency.
An equilateral triangle has three congruent sides. All angles of an equilateral triangle are congruent and measure 60 degrees.
Guided explorations of the study of symmetry using mirrors, paper folding, and pattern blocks will enhance students’ understanding of the attributes of symmetrical figures.
Determine a line of symmetry that results in two figures that have the same size and shape and explain reasoning. (a, b)