Multiple Attributes of 2D Shapes and 3D Objects
Warm-up
Hold up a cylinder. What 2D shapes can you find on it? (Two circles, one rectangle if unrolled.) Hold up a triangular prism. (Two triangles, three rectangles.) This activates the 2D-in-3D connection before the main activity.
Explore
Venn challenge: left circle = 4 or more sides; right circle = at least one pair of equal sides. Sort 12 shape cards. Which shapes are in the overlap? Which are outside both circles? Compare sorts with a partner and discuss any disagreements.
Consolidate
Practice
Students complete a two-attribute Venn sort with 10 shapes, construct 3 shapes from written descriptions on dot paper, and label the faces of 2 different 3D objects. Exit ticket: name a shape in each of the four regions of a Venn diagram (left only, right only, overlap, outside).
Exit ticket
Students complete a two-attribute Venn sort with 10 shapes, construct 3 shapes from written descriptions on dot paper, and label the faces of 2 different 3D objects. Exit ticket: name a shape in each of the four regions of a Venn diagram (left only, right only, overlap, outside).
Regular hexagon has 6 sides (4 or more: left circle) AND all sides equal (right circle). It belongs in the overlap. It also has equal angles, which would place it in other sorting circles too.
Have the student trace each face on paper. All 6 tracings are squares, not circles. A sphere looks round AND has circular cross-sections, but a cube has flat square faces. The tracing activity makes this physically clear.