Lesson 7-1

LET'S INVESTIGATE Work with 2-D and 3-D Shapes

For more help with this lesson, view the Another Look Video.

MATH HELP AT HOME

Sample Additional Practice Exercise 1

Look at the solid shape. Think of the shapes you would make if you printed each flat surface of the solid. Put an X on any flat shape that is NOT part of the solid shape.

A triangular prism with an arrow pointing to a rectangle, a circle, and a triangle. The circle is crossed out.

The solid has sides that are rectangles and sides that are triangles, so you would print rectangles and triangles if you printed each flat surface of the solid. You would not print any circles.

HOME ACTIVITY

Around the House

MATERIALS

Solid Object, Paper, Pencil

ACTIVITY

Have your child trace the flat surfaces of a solid object such as a can or a box. Ask your child to describe the flat shape they have drawn.