Law of Sines Teacher Resources

Find Law of Sines lesson plans and worksheets
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Law of Sines—Law of Sines and Law of Cosines

For Teachers 10th - 12th Standards
It's important to abide by the law. A thought-provoking instructional activity helps learners derive the Law of Sines. They then apply the Law of Sines to find unknown measures. 
6:34
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Proof: Law of Sines

For Students 11th - Higher Ed
In this video, Sal proves the Law of Sines by using the SOH-CAH-TOA model and setting up equivalent ratios.
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Deriving and Applying the Law of Sines

For Teachers 9th - 12th Standards
Breaking the law isn't possible when talking about the Law of Sines. Individuals learn to apply the Law of Sines to solve problems involving triangles. They also learn to derive the Law of Sines.
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Applying Laws of Sines and Cosines

For Teachers 9th - 11th Standards
How does the Law of Sines differ from the Law of Cosines? Learners, working cooperatively in small groups, try to gain insight into this question. The activities center around using both laws in different scenarios including real-world...
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Law of Sines

For Teachers 10th - 12th Standards
One must obey the sine laws. A instructional activity introduces and derives the Law of Sines for non-right triangles. With examples that use the Law of Sines to determine unknown measures in triangles, the instructional activity checks...
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Law of Sines

For Teachers 9th - 12th Standards
Laws are meant to be broken, right? Learners derive the Law of Sines by dropping a perpendicular from one vertex to its opposite side. Using the Law of Sines, mathematicians solve for various parts of triangles.
5:57
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What is the Law of Sines?

For Teachers 10th - 11th
The Law of Sines is derived in this video by using formula for the area of a triangle that multiplies _ times two adjacent sides and the sine of their included angle.
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The Law of Sines and the Law of Cosines

For Teachers Higher Ed
In this college level trigonometry worksheet, students apply the Law of Sines and the Law of Cosines to solve triangles. The four page worksheet contains forty-four problems. Solutions are not provided. 
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Introduction to Law of Sines

For Teachers 10th - 12th
Young scholars solve problems using the law of sines.  For this sines lesson, students work in groups and individually to solve problems using the law of sines.  They identify real life problems that require the use of the law of sines. ...
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Law of Sines

For Teachers 10th - 12th
In this Law of Sines worksheet, students describe, in their own words, when to use the law of sines. They give an example of a problem using the law of sines. This two-page worksheet contains one problem and a sample answer.
EngageNY

Applying the Laws of Sines and Cosines

For Students 9th - 10th Standards
Breaking the law in math doesn't get you jail time, but it does get you a wrong answer! After developing the Law of Sines and Cosines in lesson 33 of 36, the resource asks learners to apply the laws to different situations. Pupils must...
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Following the Law of Sine

For Teachers 9th - 12th Standards
Laws were not meant to be broken. Learners apply the Law of Sines to solve triangles. After doing some practice problems, they solve a real-world problem involving a city planning project.
EngageNY

Law of Sines

For Teachers 11th - 12th Standards
Prove the Law of Sines two ways. The ninth segment in a series of 16 introduces the Law of Sines to help the class find lengths of sides in oblique triangles. Pupils develop a proof of the Law of Sines by drawing an altitude and a second...
EngageNY

Putting the Law of Cosines and the Law of Sines to Use

For Teachers 11th - 12th Standards
Use the Law of Cosines and the Law of Sines to solve problems using the sums of vectors. Pupils work on several different types of real-world problems that can be modeled using triangles with three known measurements. In the process,...
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Exploring the Laws of Sines and Cosines

For Teachers 10th - 11th
This lesson uses GeoGebra on the Web, or Geometer's Sketchpad to investigate and identify the different properties of sines and cosines. The class learns how the laws of sine and cosine relates to a right triangle and a non-right...
1 In 1 Collection
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Applying Laws of Sines and Cosines

For Students 9th - 12th Standards
This worksheet provides excellent practice in applying the Law of Sines and the Law of Cosines. It consists of six problems, each of which presents a real-world scenario with an accompanying diagram. The task in each exercise is to...
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Law of Sines

For Students 10th
In this Law of sines worksheet, 10th graders solve 10 different sets of problems related to the Law of Sine and Ambiguous case. First, they determine the ratio of the sides of the triangle with the given measurements. Then, students...
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Algebra 2 & Trigonometry Practice: Law of Sines

For Teachers 9th - 12th
In this law of sines worksheet, students solve 9 multiple choice and short answer problems.  Students use the law of sines to missing side lengths and angles of triangles.
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Ten Law of Sines Problems

For Students 8th - 10th
In this law of sines worksheet, students use the law of sines to solve for the missing side or angle in ten problems.  A diagram is provided.
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Law of Sines

For Students 11th - Higher Ed
In this math worksheet, students find the solutions to the problems using the law of sines. They must have two angles and one side.
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Law of Sines and Cosines

For Students 8th - 11th
In this law of sines and cosines worksheet, students solve 8 problems finding missing sides and missing angle measures of various triangles.
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Algebra And Trigonometry - Week 3: Law of Sines

For Teachers 12th - Higher Ed
In this law of sines worksheet, students read story problems. They use both algebra and the law of sines and cosines to solve problems. This two page worksheet contains seven problems.
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Law of Sines Word Problems

For Teachers 11th - 12th
Young scholars solve word problems using the law of sines. In this precalculus lesson plan, students work in groups as they define vocabulary terms. They apply the formula of sine to answer and solve problems.
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Law of Sines and Law of Cosines

For Students 11th - 12th
In this Pre-calculus/Trigonometry worksheet, students use the laws of sines and cosines to solve triangles. The four page worksheet contains thirteen problems. Answers are not included.

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