HW: Finish Problem 1.2pg 10 #1-6 Do Now 4/2/14 Find the area of this composite figure (a figure made up of other shapes). 208cm²
Unit Goal • Understand volume as a measure of filling an object and surface area as a measure of wrapping an object.
Intro to 3D Measurement • Filling & Wrapping • Pg 2-3 • What types of things come in boxes? • What constraints (rules) might companies have about the boxes? • Are there any special types of boxes?
Cubes • What does a cube look like? • What features of a cube can we count? • We call the corners vertices. How many vertices are there? • How many edges does a cube have? • We call the sides faces. How many faces does a cube have? • What’s special about the faces?
Investigation 1 – Building Boxes • Page 5
Problem 1.1 • Work with your group to create as many nets as you can that will form closed cubes. • Use grid paper and scissors to cut them out, fold them, and see if they work! • Make a sketch in your notebook of each net that forms a cube.
Problem 1.1 • How many nets did we find? • Cube Nets • What is the total area needed to cover a unit cube?
Problem 1.2 • Using the same ideas you had when constructing nets for cubes, try making them for rectangular boxes by completing Problem 1.2 • Work with your group • Finish for Homework (along with pg 10 #1-6)
Homework • Finish Problem 1.2 • Pg 10 #1-6