standard_description: Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment’s endpoints.
problem_activity: Stage 3: Grade 2 Shapes
Required Preparation
Materials to Copy
Blackline Masters
Shape Cards Grade 2

Narrative
Students lay out the shape cards face up in rows. One partner chooses a shape. The other partner asks questions to figure out what shape they chose. Students work with triangles, quadrilaterals, and hexagons.


aligns: no