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### We found 508 reviewed resources for isosceles triangle

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Other Resource Types ( 508 )

Lesson Planet

#### Math Antics Geometry Video Lessons

The point of this collection of 12 videos is to introduce learners to three basic parts of geometry—points, lines, and planes. The presenter provides definitions, shows how to classify shapes, provides examples, and shows how to use...

Lesson Planet

#### EngageNY Geometry Module 1: Congruence, Proof, and Constructions

The 36 lessons in the Geometry Module 1 collection address transformations in teaching geometry brought on by Common Core. The focus here is on transformations and the relationships between transformations and congruence. Teacher...

Lesson Planet

#### Isosceles Triangles: Lesson

Two sides give us two angles. A segment of a playlist on basic geometry revisits isosceles triangles. The presentation explains several properties and theorems related to isosceles triangles.

Lesson Planet

#### Isosceles Triangles

In need of a fun way to define an isosceles triangle? This activity has learners fold a paper in half and then cut it to create an isosceles triangle. They determine the line of symmetry by folding the triangle in half and then use the...

Lesson Planet

#### Isosceles Triangles on a Geoboard

How many isosceles triangles can you create on a seven-by-seven peg board? This is the task scholars attack in their collaborative groups. The problem prompts discussion on distance, slope, and the definition of isosceles triangles.

Lesson Planet

#### How Do You Find Missing Angles in an Isosceles Triangle?

Finding the missing values of two angles in an isosceles triangle is not as difficult as it sounds. But how can two out of three angle's measurements be found? Well, there are special properties about an isosceles triangle which make...

Lesson Planet

#### How Do You Find Missing Angles in an Isosceles Triangle Using Right Triangles?

Given an isosceles triangle, and the value of one angle, find the missing values. There are some special properties about isosceles triangles. Use the triangle sum theorem to solve this problem. Watch this video to see how the instructor...

Lesson Planet

#### Geometry Journal: Isosceles Triangles

In this isosceles triangles worksheet, students justify and determine the symmetry of an isosceles triangle. They explore the bisector of rectangles. This three-page worksheet contains two problems. Answers are listed on page three.

Lesson Planet

#### Pythagoras Rectangles and Isosceles Triangles

When does the Pythagorean Theorem come in handy? An intriguing video uses the Pythagorean Theorem to solve problems other than simply finding the length of a side of a right triangle. Pupils find the diagonal of a rectangle and the...

Lesson Planet

#### Isosceles Triangle Theorem

In this geometry worksheet, students differentiate between regular triangles and isosceles triangles. They apply the converse theorem and the vertex angle. There are eleven questions with an answer key.

Lesson Planet

#### Theorems of Triangles

Show your school spirit while proving theorems about triangles! Your student geometers are charged with coming up with a new design for the school pennant, following specific guidelines. Along the way, they need to prove the theorem that...

EngageNY

#### Base Angles of Isosceles Triangles

Build confidence in proofs by proving a known property. Pupils explore two approaches to proving base angles of isosceles triangles are congruent: transformations and SAS. They then apply their understanding of the proof to more complex...

Lesson Planet

#### Isosceles Triangles and Special Line Segments

Under which conditions can a triangle be classified as isosceles? High schoolers practice identifying isosceles triangles and special line segments, including angle bisectors, medians of triangles, and perpendicular bisectors of sides of...

Lesson Planet

#### The Isosceles Triangle Theorem is Actually Really Simple!

The isosceles triangle comes with its own set of properties. A lecturer shows how to apply the Isosceles Triangle Theorem to find missing side lengths or angle measures. The final example involves both square roots and quadratic equations.

Lesson Planet

#### Classifying Triangles Using Sides

In this geometry worksheet, students answer 8 fill in the blank questions where they must examine 5 different complex geometric figures to classify triangles.

Lesson Planet

#### Isosceles Triangle Proof

Isosceles means two sides are congruent. Given an isosceles triangles, pupils develop a geometric proof showing that the two base angles are congruent.

Lesson Planet

#### SAT Prep: Test 1 Section 9 Part 3

If it takes a long time to complete the problems on the math SAT, it doesn't matter if they are correct - the problems that are left over will count against the student's score. Sal takes care to show quicker ways to complete problems...

Lesson Planet

#### Isosceles Triangle Spaces

How many different types of triangles can your class name? A discovery lesson guides learners through an exploration of the different triangle types and the relationships between their angles and sides. Using coordinate geometry,...

Lesson Planet

#### Triangles

In this math worksheet, young scholars answer 3 questions about an equilateral triangle. Students then answer 3 questions about isosceles triangles. Young scholars then calculate missing angles on isosceles triangles.

Lesson Planet

#### How many isosceles Triangles Can You Find?

Fifth graders solve problems while examining a variety of isosceles triangles. In this isosceles triangle instructional activity, 5th graders examine shapes to find their characteristics. Students pay particular attention to the...

Lesson Planet

#### How many isosceles triangles can you find?

Seventh graders recognize the characteristics of isosceles triangles. In this isosceles triangle lesson, 7th graders use geoboards to create isosceles triangles. Students record results and explain why they have an isosceles triangle.

Lesson Planet

#### Geometry Regents Questions: Isosceles Triangle Theorem

In this isosceles triangle worksheet, high schoolers solve 19 multiple choice and short answer problems. Students use the isosceles triangle theorem to determine unknown angle measures.

Lesson Planet

#### Classify Triangles - Problem Solving 15.3

Fourth and fifth graders count and label triangular figures, compare a square and equilateral triangle, explain classifications of triangles, and solve a word problem about an isosceles triangle. There are four critical-thinking...

Lesson Planet

#### What You Know About the Bermuda Triangle?

Get lost in the classifications. Using the backdrop of the Bermuda Triangle, pupils classify it by angle and side measures. They also learn information about the triangle and its history.

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