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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...

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### We found 133 resources with the concept proofs

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Lesson Planet: Curated OER

#### Flipped Math: Geometry

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#### 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...

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#### 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...

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#### Geometry Unit 2: Reasoning and Proof

The four lessons in the Geometry Unit 2 module are all about reasoning and proof. In the first lesson pupils watch a video introducing conditional statements and their related statements. Learners find out how to identify the hypothesis...

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#### 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,...

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#### Reasons for Geometric Statement/Reason Proofs

Stuck trying to remember the formal language of a geometric proof? Never fear, this handout has them all ready to go. The reasons are sectioned by topic so this handy guide is ready when you are to tackle those two column proofs.

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#### Proof of the Pythagorean Theorem Using Transformations

Middle and high schoolers construct a triangle using Cabri Jr. They construct squares on each of the legs and hypotenuse of the triangle. Pupils show that the area of the squares on the leg equal the area of the square on the hypotenuse.

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#### Unit 5 Review: Quadrilaterals and Polygons

Yes, it will be on the test. Young mathematicians first view an educational video to refresh their memories about material from the unit. They then complete a review worksheet where they find the measures of interior angles of polygons,...

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#### Unit 6 Review: Similar Figures

After a short review of the material from the Similar Figures Unit, pupils work through 18 problems to further practice the skills from the unit. Scholars apply those skills in the application problems at the end of the review.

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#### Side Splitter Theorem

Apply perspective to similarity. Individuals learn about the Side Splitter Theorem by looking at perspective drawings. Pupils use the theorem and its corollary to find missing lengths in figures. Next, they practice using the theorem and...

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#### Prove Triangles Similar

Show more than one way to prove similarity. Scholars learn three different methods to show two triangles are similar, Angle-Angle, Side-Side-Side, and Side-Angle-Side. Pupils practice applying these methods to determine whether two given...

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#### Parallel Lines and Triangles

Triangles bring sums to geometry. The lesson presents two theorems dealing with the angles of a triangle. Pupils learn about the Triangle Sum Theorem and the Exterior Angle Theorem, and then apply the theorems to create equations and...

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#### Proving Lines Parallel

Show it can all be proved. Scholars learn the converses of the properties of parallel lines. Using the converses, pupils determine which lines are parallel based on angle measurements and practice using a flow proof to show that two...

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#### Unit 2 Review: Reasoning and Proofs

The proof is in the review. Individuals watch a short review of the content from the unit to prepare for the unit exam. The review covers inductive reasoning, conditional and related statements, and two-column algebraic and geometric...

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#### More with Proofs

Proofs may be as easy as 1, 2, 3 ... maybe. Pupils participate in creating four example proofs. The presentation uses a list of geometric properties to develop the proofs by filling in both the statements and reasons. Scholars practice...

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#### Intro to Proofs

Prove the best way to keep up in Geometry. Scholars first review algebraic properties from Algebra. Learners then use the properties to create two-column proofs to solve linear equations before completing algebraic proofs by providing...

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#### Parallel Lines Cut By a Transversal

Perhaps planning a city isn't so difficult after all. Scholars first perform geometric constructions and investigate how parallel lines are useful in real-world situations. They then work on a city design project, drawing street maps,...

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#### Parallel Lines Cut by a Transversal

Use the parallel lines to find your way. After first reviewing geometric constructions and the relationships between angles formed by parallel lines and a transversal, young mathematicians write proofs for theorems relating to parallel...

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#### Theory vs. Scientific Theory

Why do people have scientific theories but not scientific facts? A quick video presentation defines scientific theory and the components necessary for developing a theory. The presenter emphasizes the difference between scientific proof...

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#### Algebraic Proof

Proofs do not exist only in geometry. The video shows the class different ways that proofs appear in algebra. Pupils work through a variety of algebraic proofs involving the divisibility of an algebraic expression or whether it is even...

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#### Module 3: Geometric Figures

It's just not enough to know that something is true. Part of a MVP Geometry unit teaches young mathematicians how to write flow proofs and two-column proofs for conjectures involving lines, angles, and triangles.

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#### Alternate Segment Theorem – Proof

Scholars observe a video explaining the alternate segment theorem proof. Then, they apply the theorem to additional practice problems from the text and complete a worksheet.

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#### Cyclic Quadrilateral – Proof

What do you call a quadrilateral in danger? A peril-lelogram! Scholars avoid danger by proving the opposite angles in a quadrilateral add up to 180 degrees. After viewing a brief video, they complete textbook exercises and a practice...

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#### Angle in a Semi-Circle – Proof

Young mathematicians observe a geometric proof using a short video. They see each part of the diagram clearly labeled and the simple math written off to the side. The new knowledge helps them solve additional problems independently.