Law of Sines

Author

Miriam Santana-Valadez

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Precalculus: Trigonometry (Triangle and Circular Functions)

Level

9-12

Activity Time

50 Minutes

TI Calculator

TI-Nspire™ CX series

Resource Types

Lessons

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Law of Sines

Activity Overview

In this activity the student will explore the Law of Sines, a theorem involving sine ratios that applies to all triangles.

Before the Activity

Teacher preparation
Download the attached .Doc or .PDF documents and the TI_Nspire document.
You will need to copy the .tns document to students' handheld before the exploration.
Read activities in advance.

During the Activity

Classroom management tips

Be prepared to guide students during the exploration.

Encourage students to look for patterns, make connections, and share their findings during the exploration.

After the Activity

Assessment and evaluation

Evaluate students' conjecture written on page 1.4 of their TI_Nspire document.

Make students write about their findings and support their findings in observations done during the exploration.

Activity extensions

Students can use the law of sines to find the sides lengths and angle measures of a triangle.

Students can determine the area of a triangle given side-angle-side information

Connections to other content areas to explore: sail makers can use sine ratios to determine the amount of fabric needed to make a sail.

Download Files

Download All Files (ZIP)

Before the Activity Files

Teacher Notes PDF TI-Nspire Activity TNS

Author

Miriam Santana-Valadez

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Precalculus: Trigonometry (Triangle and Circular Functions)

Level

9-12

Activity Time

50 Minutes

TI Calculator

TI-Nspire™ CX series

Resource Types

Lessons

Report an Issue

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Law of Sines

Law of Sines

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