Unit 4 Chapter 7 Section 4 Cross Sections.notebook
March 10, 2016
Unit 4
Chapter 7 Section 4
Cross Sections
Objective: To describe cross sections that result from slicing threedimensional figures
Cross Section: the two-dimensional shape that you
see after slicing through a three-dimensional figure
Cross Section of an apple
Cross Section of an tree
Unit 4 Chapter 7 Section 4 Cross Sections.notebook
March 10, 2016
Identifying a Cross Section
1) John made a clay model of a square pyramid. He shows the cross section of the pyramid by slicing the pyramid with a string. What is the shape of each cross section?
a) b) 2) Jorge and Patti are eating sushi rolls shaped like cylinders. Jorge cut his sushi roll vertically. Patti cut her sushi roll horizontally. What is the shape of each cross section?
a) b) 3) Describe the cross section formed by the slices through each figure.
a) b) Unit 4 Chapter 7 Section 4 Cross Sections.notebook
March 10, 2016
Challenge
A cross section of a rectangular prism is a rectangle with sides measuring 5 cm and 7 cm. Can the exact dimensions of the prism be determined? Explain your reasoning.
Unit 4 Chapter 7 Section 4 Cross Sections.notebook
March 10, 2016
Closure
1) Describe and draw each cross section.
a) horizontal cross section
b) vertical cross section
c) vertical cross section through the vertex
Unit 4 Chapter 7 Section 4 Cross Sections.notebook
Homework
Practice Worksheet 7­4
March 10, 2016
Unit 4 Chapter 7 Section 4 Cross Sections.notebook
March 10, 2016