Education Technology

# Activities

• ##### Subject Area

• Math: PreAlgebra: Geometry

9-12

60 Minutes

• ##### Device
• TI-30X IIB
• TI-30X IIS
• TI-34 II Explorer Plus™
• ##### Other Materials
This is Activity 11 from the EXPLORATIONS Book:
Math Investigations with the TI-30X IIS: Activities for Secondary Mathematics

## What Goes Around Comes Around - But Can You Measure It? (Perimeter, Area, and Volume)

#### Activity Overview

Students find the area and the perimeter for several geometric shapes. They also determine the surface area and volume of spheres.

#### Before the Activity

• See the attached PDF file for detailed instructions for this activity
• Print pages 106 - 108 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

Follow the activity procedures:

• Divide an irregular geometric shape into rectangles and right triangles
• Calculate the perimeter and area of the shape
• Use the calculator to find the length of a missing side, given the measures of other sides in a figure
• Repeat the steps for different figures

• Use the correct formula to compute the surface area and volume of a sphere
• Find the surface area and volume of objects in the solar system
• #### After the Activity

Students complete the Student Activity pages.

• Review student results
• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary