1. Volume of Right Prisms Unit 4, Lesson 13

2.  Today’s standard: CCSS.MATH.CONTENT.7.G.B.6 Solve real-world and mathematical problems involving area, volume and surface area of two- and three- dimensional objects composed of triangles, quadrilaterals, polygons, cubes, and right prisms. CCSS.MATH.CONTENT.7.G.B.6  How will you prove you understand this topic? By scoring at least 75% (3 out of 4) on the exit ticket.

3.  With flat 2-D shapes, we filled up the shapes with unit squares and the number of squares was the area.  With 3-D shapes, we count up how many unit cubes it takes to fill the shape and that is the volume.  Volume = 8 cm³ Area = 5 units²

4. Page 1: Volume of a Prism  Remember, the volume will be the number of unit cubes that it takes to fill up the shape.  Is there a shortcut instead of counting the cubes one by one? Hint: Think about what we did when first learning about the area of rectangles.

5. Page 3: Math Mission  Explore and apply methods for finding the volume of a right prism.

6. Page 3: Work Time The length multiplied by the width represents _______________________________________ The height represents _______________________________________ This picture shows that the formula for the volume of a rectangular prism is _______________________________________ For any prism, if we know the area of the base, we would find the volume of the prism by _______________________________________ Use the picture to help you complete each sentence.

7. Page 3: Work Time The length multiplied by the width represents the number of cubes in one layer (area) The height represents the number of layers.

8. Page 3: Work Time Volume of rectangular prism = length x width x height Volume of a prism = base x height

9. Page 4: Work Time  Only answer the first question: If the area of the base of the regular pentagonal prism is 15 cm² and the height is 6 cm, what is the volume of the prism?

10. Page 4: Work Time  Each of the 6 layers has an area of 15 cm² so the total volume is

11. Page 5: Work Time  Only solve the first problem (the triangular prism)  Notice that this is a scale drawing!

13. Direct Station  We will continue in the next Pearson lesson to discover the formula for volume of pyramids.

14. Independent Station  You will begin planning for one part of the math portion of the PBL.  You will be designing sets to use in your film. Of course, we don’t have the room to make full size sets so we will be shrinking everything down using scale factors.  This is like the design a bedroom activity – you will look up the real-life sizes of objects that you need in your video and then calculate the scale model size that you will use in your set.