Pi Graph

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In this activity, learners use a straight line to learn about circles. Learners measure and record the diameter and circumference of different sized cylindrical objects on a chart. Learners then plot the diameters and circumferences on a graph and calculate the slope to discover the linear relationship between the two proprieties.

Quick Guide

Preparation Time:
Under 5 minutes
Learning Time:
30 to 45 minutes
Estimated Materials Cost:
$1 - $5 per group of students
Age Range:
Ages 11 - 18
Resource Type:
Activity
Language:
English

Materials List (per group of students)

  • cylindrical objects of different sizes
  • string
  • ruler
  • graph paper
  • large piece of graph paper to collect group data (optional)

Keywords

Subjects

  • Mathematics
    • Algebra
      • Equations and Inequalities
      • Patterns
      • Variables and Expressions
    • Data Analysis and Probability
      • Data Analysis
      • Data Collection
      • Data Representation
    • Geometry
      • Solid Geometry
    • Measurement
      • Units of Measurement
      • Size and Scale
      • Circles
      • Rate
    • Number and Operations
      • Decimals
    • Representation
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations
      • Gathering Data
      • Formulating Explanations
      • Communicating Results

Audience

To use this activity, learners need to:

  • see
  • read
  • touch

Learning styles supported:

  • Involves hands-on or lab activities

Other

This resource is part of:

Access Rights:

  • Free access

By:

  • Yu, Julie

Rights:

  • All rights reserved, Exploratorium, 2008

Funding Sources:

  • National Science Foundation, 0610238
  • National Science Foundation, 0925383