# Similar Right Triangles Teacher Resources

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EngageNY

#### EngageNY Geometry Module 2: Similarity, Proof, and Trigonometry

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....

Lesson Planet

#### Mathematics Vision Project: Interactive Applets

Ready, set, go! The Mathematics Vision Project provides a collection of 10 Interactive Applets that follow the progression of learning—to practice, develop, and solidify understanding. The interactives use engaging materials that include...

Lesson Planet

#### Grade 8, Claim 1: Concepts and Procedures Item Slide Shows

Ten resources make up a collection of student and teacher-friendly slides that prepare eighth graders for the Smarter Balance assessment. Learners review rational and irrational numbers, convert repeating decimals to fractions, as well...

Lesson Planet

#### Pythagorean Theorem for Solving Right Triangles: Solving the Triangle

Observe the change in the trigonometric ratios as angles vary. An interactive provides the values of trigonometric ratios for both acute angles in a right triangle. Pupils create a right triangle to match given criteria and find the...

Lesson Planet

#### Special Right Triangles and Right Triangle Trigonometry

Right triangles are so special! Use special right triangles to discover the trigonometric ratios. Pairs construct special right triangles and find the values of the ratios of the sides. In the process, they discover the ratios stay the...

Lesson Planet

#### Lengths of Sides in Isosceles Right Triangles: Paper Football

Fuse sports and geometry by having your class create paper footballs—that are actually isosceles right triangles! Scholars use an interactive to create an isosceles right triangle to model a paper football. From the information in the...

Lesson Planet

#### Relationships of Sides in 30-60-90 Right Triangles: Truck on a Mountain Road

Determine the change in elevation on a mountain road. Individuals use the interactive to simulate a truck driving up a mountain road with a 30-degree incline. They determine missing sides of a 30-60 right triangle to find horizontal and...

EngageNY

#### Prove the Pythagorean Theorem Using Similarity

Amaze your classes with the ability to find side lengths of triangles immediately — they'll all want to know your trick! Learners use the Pythagorean Theorem and special right triangle relationships to find missing side lengths.

EngageNY

#### Special Relationships Within Right Triangles—Dividing into Two Similar Sub-Triangles

Why are right triangles so special? Pupils begin their study of right triangles by examining similar right triangles. Verifying through proofs, scholars recognize the three similar right triangles formed by drawing the altitude. Once...

Lesson Planet

#### Inscribed Similar Triangles: Lesson

Create similar triangles with a little altitude. A section of an extensive playlist on basic geometry discusses how an altitude of a right triangle creates similar triangles. Using the theorem, the presentation finds unknown side...

Lesson Planet

#### Similar Right Triangles and Trig Ratios

Is it possible to be the same yet different? Absolutely! The activity asks learners to explore the relationships between side ratios of triangles they have drawn. Because individuals all draw a triangle with the same angle measures, they...

Lesson Planet

#### Special Triangle Ratios: Special Right Triangle Ratios

Go from one side length to any other side length with special right triangles. Individuals use the interactive to investigate the ratio of sides in 45-45 and 30-60 right triangles. Scholars make generalizations about the types of special...

Lesson Planet

#### Right Triangles, Bearings, and Other Applications: Sailing Race

Help your class get their bearings when it comes to right triangles. Pupils determine distances traveled or components given the bearing of a sailboat using an interactive. The scholars develop a sense of finding the bearings of a given...

Lesson Planet

#### Distance Formula: Right Triangles

Go the distance with a far out resource. Individuals use an interactive to create right triangles on a coordinate plane to help find distance between two points. Challenge questions aid them in developing the distance formula.

Lesson Planet

#### Geometric Mean and Congruent Right Triangle

Students investigate right triangles using the six trigonometric identities. In this geometry lesson, students examine why the altitude in a right triangle creates two or more right triangles.

Lesson Planet

#### Special Right Triangles

Students calculate different parts of a right triangle. In this algebra lesson, students use the Pythagorean Theorem and the similarity and congruent theorems to solve triangular problems.

Lesson Planet

#### Similarity: Instructional

In this similarity worksheet, students solve and complete 7 different problems that include determining various dimensions of mirrors shown. First, they find the length of the diagonal of the large mirror in the diagram. Then, students...

Lesson Planet

#### Similarity and Right Triangle Trigonometry

Starting with similar triangles and dilation factors, this unit quickly and thoroughly progresses into the world of right triangle features and trigonometric relationships. Presented in easy-to-attack modules with copious application...

Lesson Planet

#### Applying the Pythagorean Theorem in a Mathematical Context

Participants who use this resource will apply the Pythagorean Theorem to show whether or not the shaded triangle inscribed in a rectangle is a right triangle. Once all of the sides on the shaded triangle are found, it is important that...

Lesson Planet

#### Similar Right Triangles-Introductions to Trigonometry

In this geometry worksheet, students examine similar right triangles as the basis for the foundation of trigonometry. Students define the basic trigonometric functions and use a calculator to find the trigonometric value of an angle. The...

Lesson Planet

#### Practice 7-4: Similarity in Right Triangles

In this right triangle worksheet, students determine the similarity of given worksheets. They find the length of one side of a triangle. This one-page worksheet contains 19 multi-step problems.

Lesson Planet

#### Special Right Triangles

Students use Geometric Sketchpad to describe properties of special right triangles. In this right triangles lesson plan, students complete worksheets provided.

Lesson Planet

#### Right Triangle Ratios

In this right triangles worksheet, students fill out a chart for right triangles in sine, cosine, and tangent and complete word problems. Students complete 5 problems total.

Lesson Planet

#### Lengths of Triangle Sides Using the Pythagorean Theorem: Find the Missing Side

What is the relationship between the sides of a right triangle? Learners use an interactive to create models of right triangles and view the relationship between the lengths of the sides. They finish by using the Pythagorean Theorem to...