Special Right Triangles Worksheets
Special Right Triangles Worksheets

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Special Right Triangles

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In this special right triangles worksheet, students solve 15 short answer problems. Students use trigonometric functions to find missing side lengths of various right triangles.

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Lesson Plan

#### Finding the Area of an Equilateral Triangle

Curated OER

The problem seems simple: find the area of the equilateral triangle whose sides are each length 1. In fact, this same problem is solved in 8th grade, addressing a different Common Core standard, using the formula for area of a triangle…

9th – 11th Math CCSS: Designed

Lesson Plan

#### 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…

9th – 10th Math CCSS: Designed

Lesson Plan

#### Identifying a Triangle by its Sides and Angles

Texas Instruments

Identify triangles by their angle measures and side lengths by looking at and measuring angle measures and side lengths. Use Cabri Jr. to construct various triangles, then manipulate the construction to create the 6 types of triangles,…

9th – 12th Math CCSS: Designed

Interactive

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

CK-12 Foundation

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…

9th – 12th Math CCSS: Adaptable

Instructional Video

How Do You Find a Missing Side of a Right Triangle Using Cosine?

Curated OER

Trigonometry? What’s trigonometry. Well, something to do with triangles, right? Right! Right triangles! In this problem, find the missing length of one of the sides. So set this up as a ratio: cosine(A) = adjacent side length divided by…

5 mins 6th – 11th Math

Interactive

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

CK-12 Foundation

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…

9th – 12th Math CCSS: Designed

Lesson Plan

#### Triangle Area

Shodor Education Foundation

While the lesson focuses on right triangles, this activity offers a great way to practice the area of all triangles through an interactive webpage. The activity begins with the class taking a square paper and cutting in in half; can they…

6th – 9th Math CCSS: Adaptable

You are watching: Special Right Triangles Worksheet for 9th – 12th Grade. Info created by Bút Chì Xanh selection and synthesis along with other related topics.