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# Bridge builder: triangles 1

TLF ID L1922

Build bridges by adding triangular sections. Each section is made up of three beams. Make bridges in order of increasing widths (increasing by one section each time). Examine a table and graph of the total number of beams used in bridges of different sizes. Predict the number of beams needed to build a wider span. Describe the number pattern. This learning object is the first in a series of five objects that progressively increase in difficulty.

#### Educational details

Key learning objectives
• Students identify and extend spatial and number patterns.
• Students use tables and graphs to create formulas and explore relationships between tabular, graphical and algebraic forms.
• Students solve problems by selecting and applying efficient multiplicative strategies.
Educational value
• Students extend number patterns and identify specific terms within a pattern.
• Students enter data sytematically into tables.
• Students observe and interpret line functions and their graphs.
• Illustrates the usefulness of tables and graphs to identify and display patterns.
• Students generalise multiplicative patterns and rules by relating words and algebraic forms.
• Illustrates that there may be different, but equivalent, algebraic formulas for the same pattern.
Year level

4; 5; 6

Learning area
• mathematics
Strand
• Mathematics/Number and algebra
Concept
• Mathematics/Number patterns
• Mathematics/Multiples
• Mathematics/Multiplication
• Mathematics/Algebra
• Mathematics/Arithmetic
• Mathematics/Computation
• Mathematics/Factors
• Mathematics/Graphs
• Mathematics/Formulas
• Mathematics/Linear functions
• Mathematics/Spatial patterns
• Mathematics/Triangles
Skill
• Analysis;
• Application;
• Comprehension;
• Knowledge
Student activity
• Interactives;
• Experiment;
• Analysis;
• Modelling
Learning design
• Experiential learning;
• Independent learning;
• Problem solving;
• Visual learning

#### Other details

Contributors
• Technical implementer
• Script writer
• Name: Rod Rees
• Organisation: Rees Films Pty Ltd
• Subject matter expert
• Name: Howard Reeves
• Educational validator
• Publisher
• Date of contribution: 20 Sep 2013
• Organisation: Education Services Australia
• Address: Melbourne VIC 3000 Australia
• URL: http://www.esa.edu.au/
Access profile
• Colour independence
• Device independence
• Hearing independence
Learning resource type
• Interactive Resource
Browsers
• Microsoft Internet Explorer - minimum version: 8.0 (MS-Windows) - maximum version: 9.0 (MS-Windows)
• Firefox - minimum version: (MS-Windows)
• Safari - minimum version: 5.1 (MacOS)
Operating systems
• MacOS - minimum version: 10.6
• MS-Windows - minimum version: XP - maximum version: 7
Rights
• © Education Services Australia Ltd, 2013, except where indicated under Acknowledgements.