Law of Cosines Teacher Resources

Find Law of Cosines lesson plans and worksheets
Showing 1 - 24 of 96 resources
EngageNY

EngageNY Precalculus and Advanced Topics Curriculum

For Teachers 11th - 12th Standards
A 5-module complete precalculus course begins with young mathematicians exploring linearity, complex number operations as transformation, and the power of the right notation. Module 2 has pupils examining incidence relationships in...
EngageNY

EngageNY Geometry Module 2: Similarity, Proof, and Trigonometry

For Teachers 9th - 12th Standards
The Geometry Module 2: Similarity, Proof, and Trigonometry collection includes 36 lessons that are divided into five topics: Scale Drawings, Dilations, Similarity and Dilations, Applying Similarity to Right Triangles, and Trigonometry....
EngageNY

EngageNY Precalculus and Advanced Topics Module 4: Trigonometry

For Teachers 11th - 12th Standards
Introduce advanced math students to the power of trigonometry! The 14 lessons in the Module 4 collection are divided into three topics: Trigonometric Functions, Trigonometry and Triangles, and Inverse Trigonometric Functions. Each lesson...
3:56
Lesson Planet

Law of Cosines

For Students 11th - Higher Ed
Sal derives the Law of Cosines using a method similar to the wayward ship captain word problem he solves in another video. This video provides a good review of using the SOH-CAH-TOA model, the Pythagorean Theorem, some of the basic trig...
2 In 2 Collections
EngageNY

Law of Cosines

For Teachers 11th - 12th Standards
Build upon the Pythagorean Theorem with the Law of Cosines. The 10th part of a 16-part series introduces the Law of Cosines. Class members use the the geometric representation of the Pythagorean Theorem to develop a proof of the Law of...
Lesson Planet

Law of Cosines: Angles in the Outfield

For Students 10th - 12th
Take me out to the trig class. Individuals use an interactive to see how angles on a baseball field change as the position of two runners change. A set of challenge questions has them apply the Law of Cosines to solve problems.
Lesson Planet

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. 
2 In 2 Collections
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,...
Lesson Planet

Law of Cosines: Baseball Diamond

For Students 10th - 12th
Catch a great resource! Individuals use an interactive that allows them to move players on a baseball field. They calculate distances between players using the Law of Cosines.
Lesson Planet

Law of Cosines: Get on Base

For Students 10th - 12th
Baseball is all about math. Young baseball and mathematics enthusiasts determine the distance between players on a baseball field using the Law of Cosines. An interactive helps them find relevant distances and angles to use in their...
Lesson Planet

Law of Cosines: Building a Zip Line

For Students 10th - 12th
Zip this resource into your lesson plans. Here is an interactive that shows how angles and lengths change based on conditions for a zip line. Scholars use the Law of Cosines to solve problems in this context.
Lesson Planet

A Different Proof of the Law of Cosines

For Students 9th - 12th
In this proofs activity, students construct 1 proof of the law of cosines.  Students construct a right triangle within a circle to  prove the law of cosines.
Lesson Planet

Identify Accurate Drawings of Triangles: Law of Cosines

For Students 10th - 12th Standards
Drawing triangles is easy, even if you have to calculate the exact length of its sides. Scholars use the Law of Cosines to find missing sides of triangles. An interactive helps them check their answers.
Lesson Planet

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. 
Lesson Planet

The Law of Cosines

For Students 10th
In this law of cosines worksheet, 10th graders solve and complete 12 various types of problems. First, they find each indicated measure and give lengths to the nearest tenth and angles to the nearest degree. Then, students solve each...
Lesson Planet

Law of Cosines Practice

For Teachers 8th - 10th
Young scholars practice solving problems with non-right triangles. In this precalculus lesson, students define and identify the properties of the Law of Cosine. They solve problems and investigate the history behind Cosine.
Lesson Planet

Law of Cosines Word Problem

For Teachers 10th - 11th
Students solve problems using the law of cosines. In this precalculus activity, students meet different criteria as they solve problems. They apply the formula for cosines to solve word problems.
2:51
Lesson Planet

Sine or Cosine Rule?

For Students 9th - 12th Standards
Explore triangle problems that require the Law of Sine or Law of Cosine. A straightforward lesson focuses on deciding when to use each law. The instructor presents several triangles for pupils to consider and describes patterns in the...
Lesson Planet

Squares on a Trianlge

For Teachers 11th - 12th
Young scholars explore the law of cosines.  In this geometry/trigonometry lesson, students investigate the relationship between the Pythagorean Theorem and the law of cosines.  The lesson is designed to guide young scholars in deriving...
Lesson Planet

Concepts in Precalculus 1: Trigonometry

For Teachers 11th - 12th
Students investigate trigonometry.  In this Algebra II/Pre-calculus/Trigonometry instructional activity, students explore Islamic achievements in mathematics as they calculate angles and distances using the Law of Sines and the Law of...
Lesson Planet

Section 6.1-6.2 Precalculus: Trigonometry

For Students 9th - 12th
In this trigonometry worksheet, students solve 15 triangle problems.  Students use the law of sines and law of cosines to find the missing angles and side lengths of a triangles.
Lesson Planet

Law of Cosines

For Students 10th
In this Law of Cosines activity, 10th graders solve 10 different problems related to applying the Laws of Cosine. First, they determine the length of a side rounded to the nearest integer. Then, students determine the largest angle of a...
Lesson Planet

“The *Distance* Less Traveled

For Students 11th - 12th Standards
Use geometry to find your way from point A to point B! Learners work to build the Law of Cosines using a conceptual exercise. They use their knowledge of Law of Sines and a map triangulation activity to write their own equations for the...
Lesson Planet

Let's Go On Vacation!

For Students 9th - 12th Standards
You can cover some ground traveling from point A to point B to point C. Learners apply trigonometry to give values to the ground you cover. They choose three locations and create a map. Using the Law of Sines, Law of Cosines, and Heron's...

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Law of Cosines