Lesson: Composing and Decomposing 3D Shapes Elementary School Mathematics 1st Grade • Math in Focus • Singapore Math • Grade 2 • Volume B • Common Core • Prentice Hall • Mathematics • Course 1 • Common Core

Mathematics

In this lesson, we will learn how to compose 3D shapes to make a composite shape and decompose composite shapes into smaller shapes.

Sample Question Videos

Q1:

Daniel and Natalie have both built a model out of shapes. Daniel has used fewer cubes than Natalie.

Which picture is Natalie’s?

Q2:

How many cones are there?

Q3:

Determine the two-dimensional figure that results from slicing the given three-dimensional shape as shown.

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