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
Context
DO
Know

Line of symmetry

Recognize

2 – dimensional figure
Definition notes:
Line of symmetry: a line which divides a figure into parts that are congruent
Congruent: geometric figures that have the same size and the same shape
Intent Statement: Recognize the line that divides a figure into parts that have the same size and same shape in a 2dimensional figure
1. Most Complex Level (at the level as written):
 Content Target: Given a choice of similar two dimensional figures with dividing lines the student will select the one
that demonstrates a line of symmetry
 Example: Which picture shows each side as exactly the same (line of symmetry)
2. Mid-Complex Level:
 Content Target: Given a definition of symmetry (parts that are the same size and shape), and an object that
represents a line, the student will select the shape that demonstrates symmetry
 Example: Model symmetry using a tangible such as a wiki stick, a cut out piece of paper to represent a line, etc. to
student. Have the student examine each shape and chooses the shape that shows symmetry.
Example Together
3. Least Complex Level:
 Content Target: Given modeling and tangible 2 D shapes, students will select the shapes that demonstrates
symmetry (parts that are the same size and shape)
 Example: Present students with concrete shapes of paper hearts (as examples.) Fold one heart along a line. Say
when we folded object in two it makes the parts the same. Show me the heart that has two parts the same.
Have student choose the heart which show parts that are the same size and shape
Fold this heart