standard_description: (+)Derive the equations of ellipses and hyperbolas given the foci, using the fact that the sum or difference of distances from the foci is constant.
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