Lesson Plan
Curated OER

Trigonometric Applications Outside the Classroom

For Teachers 5th
Fifth graders describe and demonstrate how trigonometry can be used to find the height of a tall building or tree. They describe and demonstrate how trigonometry can be used to find the height of a high hill, or other high object where...
Lesson Plan
Curated OER

Optional Laboratory: Calculating Board Footage in a Tree

For Teachers 6th - 8th
Middle schoolers work together to complete an experiment calculating the amount of board footage in a tree. They record their data and answer questions at the end of the lesson. They create their own hypothesis as well.
Lesson Plan
Curated OER

How Fast Does This Tree Grow?

For Teachers 6th - 8th
Middle schoolers work together to determine how fast trees go. They make predictions and complete simple measurements. They answer questions to end the activity.
Handout
Other

Elms Environmental Education Center: How to Use a Clinometer

For Students 4th - 8th
Offers instructions in how to use a clinometer, an instrument used by foresters for measuring angles in order to determine the height of a tree. The mathematics behind a clinometer is also explained.
Website
Other

Instructables: Using a Clinometer to Measure Height

For Students 9th - 10th
Explains step by step, supported by pictures, how to use a clinometer to measure the height of a tall object.
Activity
Exploratorium

Exploratorium: Ilion High: Build a Clinometer

For Students 9th - 10th Standards
Instructions for building a clinometer are given on this page. Clinometers can be used to measure the angle of elevation of a right triangle, and in turn find the height of large objects.
Lesson Plan
TeachEngineering

Teach Engineering: Handheld Trigonometry

For Teachers 9th - 10th Standards
In addition to understanding the concept of similar right triangles and how they apply to trigonometric ratios, students explore a clinometer app, and discover how it can be used to test the mathematics underpinning trigonometry.
Activity
TeachEngineering

Teach Engineering: Trigonometry via Mobile Device

For Teachers 9th - 10th
Students investigate the relationships between angles and side lengths in right triangles with the help of materials found in the classroom and a mobile device.
Lesson Plan
Alabama Learning Exchange

Alex: The Clock Tower

For Teachers 9th - 10th
This project resulted from the collaboration of a computer aided drafting teacher (pre-engineering), Chris Bond, and a math teacher, Lee Cable, (Hewitt-Trussville High School) to provide higher math expectations in CT and real life...
Activity
Texas Instruments

Texas Instruments: Real Life Real World Activity Forestry

For Teachers 9th - 10th
Forest industry professionals make measurements in their work using tools including the Clinometer and the Biltmore Stick. These tools are based on the concepts of similar triangles and trigonometric ratios in a right triangle. This...

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