Download M04CG1.1.3a Recognize a line of symmetry in a two

PA Reporting Category: M04.C-G Geometry
PA Core Standards:
• CC.2.3.4.A.1 Draw lines and angles and identify these in two‐dimensional figures.
• CC.2.3.4.A.2 Classify two‐dimensional figures by properties of their lines and angles.
• CC.2.3.4.A.3 Recognize symmetric shapes and draw lines of symmetry.
Assessment Anchor: M04.C-G.1 Draw and identify lines and angles, and classify shapes by properties of their lines and
angles.
Descriptor: M04.C-G.1.1 List properties, classify, draw, and identify geometric figures in two dimensions.
Eligible Content: M04.C-G.1.1.3 Recognize a line of symmetry for a two-dimensional figure as a line across the figure
such that the figure can be folded along the line into mirroring parts. Identify line-symmetric figures and draw lines of
symmetry (up to two lines of symmetry).
Alternate Eligible Content Code: M04CG1.1.3a
Alternate Eligible Content: Recognize a line of symmetry in a two-dimensional figure.
Alternate Eligible Content - Coded
DO
Know
•
Line of symmetry
•
Recognize
Context
•
2 – dimensional figure
Definition notes: Line of symmetry is a line which divides a figure into parts that are congruent.
Intent Statement: Identify when a flat surface (2-d) is separated into equal parts.
1. Most Complex Level (at the level as written):
• Content target: Identify when a flat surface (2-D) is separated into equal parts.
• Example: Present 3 different shapes with a line placed in any direction with one separating a shape in half. Ask the
student to find the shape that shows symmetry or sameness on both side of the line.
2. Mid-Complex Level:
• Content target: Identify when a flat surface (2-D) is separated into equal parts.
• Example: Present 3 examples per set with only one type of shape per set of examples and no other changes in
attributes (color, size, etc.) across the shape, have the student find the shape that is the same on both sides of the
line.
3. Least Complex Level:
• Content target: Identify when a flat surface (2-D) is separated into equal parts.
• Example: Use a simple shape that is easy to identify for sameness when divided. Use only one type of shape per set
of examples and no other changes in attributes across shape (color, size, etc.)). Fold one shape into a half and the
other into an obvious non-half. Ask the student to find the one that has same sides. Help the student compare sides
by refolding to look for sameness in size of sides. (Dotted line shown on hearts is to demonstrate a fold line).