Identifying Nets for 3D Figures

The video tutorial guides seventh graders through lesson three, session two, focusing on representing three-dimensional figures with nets. The lesson includes a triad activity where students help Amelia create a model of the Great Pyramid of Giza using a square pyramid net. The teacher explains how to analyze nets to determine which can form a square pyramid, using reasoning and tables to organize information. Students are encouraged to pause and reflect on their reasoning and to practice with additional problems involving triangular pyramids and prisms.

What is the shape of the base of a square pyramid?

• Circle

• Square

• Rectangle

• Triangle

Which net can be used to form a square pyramid?

• A net with three squares

• A net with no squares

• A net with one square and four triangles

• A net with two squares and two triangles

How does reasoning help in identifying the correct net for a 3D figure?

• By matching the number of faces

• By guessing the shape

• By drawing random shapes

• By using a ruler

How can a table help in choosing the correct net for a pyramid?

• By listing all possible shapes

• By displaying the size of the faces

• By showing the colors of the faces

• By organizing the types of faces

What must be true about the shapes in a net for a 3D figure?

• They must be colorful

• They must be larger than the figure

• They must be identical

• They must enclose the figure without gaps

What is a key characteristic of a net that forms a closed 3D figure?

• It has overlapping edges

• It has a single face

• It has no triangles

• It has matching edges when folded

Which of the following is NOT a property of a net for a 3D figure?

• It must form a closed shape

• It must match the faces of the 3D figure

• It must be colorful

• It must have matching edges when folded

Which line segment will match up with segment A to form the edge of a triangular pyramid?

• Segment D

• Segment C

• Segment E

• Segment B

What is the shape formed by folding a net with two triangles and three rectangles?

• Square Pyramid

• Triangular Prism

• Cylinder

• Rectangular Prism

What is the base shape of a triangular pyramid?

• Circle

• Triangle

• Square

• Rectangle