Geometry: Trigonometric Ratios

by Texas Instruments

Overview

Students discover the trigonometric ratios through measuring the side lengths of similar triangles and calculating their ratios. The formal definitions of the sine, cosine, and tangent or an angle are presented and applied to find the missing side lengths.

Key Steps

Students will measure the angle of a triangle.
Students will compare triangles to see if they are similar.
Students will apply the sine, cosine, and tangent of angles to find missing side lengths.

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Teacher Files

Student Files

Alignment

Device

Software

Applications

Cabri™ Jr. for TI-83 Plus and TI-84 Plus

Cabri™ Jr. for TI-84 Plus C Silver Edition

Cabri™ Jr. for TI-84 Plus CE

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Geometry: Trigonometric Ratios

Overview

Key Steps

Distances in the Coordinate Plane

The Pythagorean Theorem

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Download

Teacher Files

Student Files

Alignment

Device

Software

Applications

Cabri™ Jr. for TI-83 Plus and TI-84 Plus

Cabri™ Jr. for TI-84 Plus C Silver Edition

Cabri™ Jr. for TI-84 Plus CE

Report an Issue

Geometry: Trigonometric Ratios

Overview

Key Steps

Related Activities

Distances in the Coordinate Plane

The Pythagorean Theorem

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