# Trigonometry: measuring with triangles

Learning Material, Learning Guide, Learning Module  |  Interactive Lesson  |  RAR

Published on 2018 August 1st

Description
Compare the shadows cast by a small stick and a larger object such as a column of a Greek building. Check the angles at which the shadows are cast and confirm whether the two objects create similar triangles. Use equivalent ratios to calculate the lengths of triangles' sides: height of an object or the length of a shadow. Explore how right-angle triangles can be used in measurement, including special properties of the isosceles right-angle triangle. This learning object is one in a series of ten objects.
Objective
1. Students apply knowledge of relationships between sides of similar triangles to calculate side lengths in right-angle triangles.
2. Students use multiplicative and ratio strategies to solve measurement problems.

#### Curriculum Information

 Education Type K to 12 Grade Level Grade 1, Grade 2, Grade 7, Grade 8, Grade 4, Grade 3, Grade 9, Grade 5, Grade 6, Grade 10 Learning Area Mathematics Content/Topic Numbers and Number Sense Geometry Patterns and algebra Measurement Patterns and Algebra Intended Users Learners, Students Competencies

#### Copyright Information

 Copyright Yes Copyright Owner Education Services Australia Conditions of Use Use, Copy

#### Technical Information

 File Size 0 bytes File Type application/x-rar Software/Plug-in Requirements Adobe Flash Player - http://get.adobe.com/flashplayer/