# Theorems Teacher Resources

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Lesson Planet Curated

#### Geometry Unit 4: Triangle Congruence

The Geometry Unit 4: Triangle Congruence unit module contains five lessonsâ€”each with a video, teacher reference, practice packets, solutions, and corrective assignments. To begin, scholars review the types of triangles, then investigate...

Lesson Planet Curated

#### Flipped Math: Geometry

Imagine taking a complete geometry course remotely! Eleven units make up the My Geometry course. Each unit follows the Flipped-Mastery cycle of learning, divided into two semesters. Pupils watch and take notes on a video that details the...

Lesson Planet Curated

#### Geometry Unit 3: Parallel and Perpendicular Lines

The Geometry Unit 3: Parallel and Perpendicular Lines Unit Module contains seven lessons, each with a video, teacher reference, practice packets and solutions, and corrective assignments. In the first lesson, pupils learn eight...

Lesson Planet Curated

#### Geometry Unit 7: Right Triangles

Six lessons comprise the Geometry Unit 7: Right Triangles unit module. In the first lesson, pupils review the Pythagorean Theorem and determine how to use the converse to determine whether a triangle is right, obtuse, or acute. Next,...

Lesson Planet Curated

#### Geometry Unit 9: Area of Polygons

Six lessons make up the Geometry Unit 9: Area of Polygons unit module. Pupils review the formulas for finding the area of parallelograms and triangles. They apply previous learning of trigonometric ratios and the Pythagorean Theorem to...

Lesson Planet Curated

#### Exploring Space Through Math: Geometry

The Exploring Space Through Math series offers six geometry lessons that use NASA resources to teach learners how to use the mathematics of deductive and spatial reasoning. They use geometry to compare the dimensions of the NBL pool, the...

Lesson Planet Curated

#### Math Antics Geometry Video Lessons

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

Lesson Planet Curated

#### Exploring Space Through Math: Geometry

Young mathematicians use their knowledge of geometry and precalculus to study the movement of the robotic arm on the International Space Station (ISS) and the flight pattern of NASAâ€™s C-9 jet. In addition, they use spherical coordinates...

Lesson Planet Curated

#### Geometry Unit 11: Circles

The five resources in the Geometry Unit 11: Circles Unit Module are designed for the flipped classroom. Pupils watch videos that show how to apply concepts about circles, tangents, congruent chords and arcs, and intercepting arcs....

Lesson Planet Curated

#### Geometry Unit 6: Similar Figures

Similar figures are the topic of Geometry Unit 6. Each of the four resources in the unit module contains a video, teacher reference, practice packets, solutions, and corrective assignments. In the first lesson, pupils learn the...

Lesson Planet Curated

#### Mathematics Assessment Project: Tests for College & Career Readiness - High School

A collection of six tests are designed to assess the College and Career Readiness of high school algebra I, algebra II, geometry, and statics and probability learners. Each assessment includes the test form and scoring and comes in 40,...

Lesson Planet Curated

#### Mathematics Assessment Project: Tests for Middle School

Good assessments are hard to findâ€”assessments that address content standards and fit into standard class periods. The six assessments in the middle school collection are 80-minute forms, divided into two 40-minute sections, and are...

Lesson Planet Curated

#### Exploring Space Through Math: Algebra II

The three lessons in the Algebra II series Exploring Space Through Math expand learnersâ€™ knowledge of algebraic thinking and symbolic reasoning and encourage them to connect algebra and geometry. Activities include calculating the number...

EngageNY

#### Thalesâ€™ Theorem

Isn't paper pushing supposed to be boring? Learners attempt a paper-pushing puzzle to develop ideas about angles inscribed on a diameter of a circle. Learners then formalize Thales' theorem and use geometric properties to develop a proof...

Curated OER

#### Pythagorean Theorem

Crossing into the realm of geometry with this video, Sal introduces the Pythagorean Theorem to viewers. He uses several examples (and right triangles) to illustrate the uses and application of the Pythagorean Theorem.

Curated OER

#### Pythagorean Theorem All

As the second in a series on the Pythagorean Theorem, this lecture delves into some more difficult problems. Primarily, it examines the process for finding the value of a hypotenuse. It is particularly helpful because the example problem...

Curated OER

#### Pythagorean Theorem All

West Contra Costa Unified School District

#### Pythagorean Theorem and Its Converse

Challenge scholars to prove the Pythagorean Theorem geometrically by using a cut-and-paste activity. They then must solve for the missing sides of right triangles.

Curated OER

#### Area of a Rectangle - Geometry Help

How on earth is one to find the area of a rectangle when he doesn't know the width? Using the diagonal of the rectangle, the length, and the Pythagorean Theorem the missing side is determined and the area is discovered. This clip is...

CK-12 Foundation

#### Triangle Sum Theorem: Lesson

The measures all add up. The presentation, part of a helpful playlist on geometry, provides the statement of the Triangle Sum Theorem. Using the theorem, the video shows how to find the missing measure of an angle.

CK-12 Foundation

#### Applications of the Pythagorean Theorem: Lesson

The Pythagorean Theorem works for something other than right triangles; show your class all it can do. Using information from the Pythagorean Theorem, the video shows how to determine whether a triangle is an acute or obtuse triangle....

CK-12 Foundation

#### The Third Angle Theorem: Lesson

If two sets of angles are equal, the third set is too. An informative portion of a playlist on geometry develops the Third Angle Theorem for triangles. Using the theorem, the presenter shows how to determine the measure of missing angles...

CK-12 Foundation

#### ASA and AAS Triangle Congruence Lesson

The location of the side makes a difference. One of the videos in a geometry playlist introduces angle-side-angle and angle-angle-side congruence relationships. Using drawings, the video shows how these two congruence statements are...

Curated OER

#### Understanding the Pythagorean Theorem

Who is Pythagoras and what is the Pythagorean Theorem? Ben knows and he's made a video all about it! The Pythagorean Theorem is defined, the procedure is demonstrated, and an example is provided. Ben also mentions how the theorem is used...