# Geometric Proof Teacher Resources

Find Geometric Proof lesson plans and worksheets
Showing 1 - 24 of 151 resources
EngageNY

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

For Teachers 9th - 12th Standards
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

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

For Teachers 9th - 12th Standards
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...
EngageNY

#### EngageNY Algebra I Curriculum

For Teachers 9th - 12th Standards
The Algebra 1 curriculum set is designed to help scholars develop fluency in writing, interpreting, and solving linear equations, The 30 lessons in Module 1 are divided into four topics: An Introduction to Functions, the Structure of...
EngageNY

#### EngageNY Algebra I Module 1: Relationships Between Quantities and Reasoning with Equations and Their Graphs

For Teachers 9th - 12th Standards
The Algebra 1, Module 1 collection is designed to help students develop fluency in writing, interpreting, and solving linear equations The 30 lessons are divided into four topics: An Introduction to Functions , the Structure of...
7 Items in Collection
Lesson Planet

#### Proof That Geometry Isn't Difficult

For Teachers 8th - 11th Standards
Prove that Geometry can be challenging in a good way with a wide-ranging collection of resources on proofs. The topics focus on the main skills while young mathematicians to think outside the box.
EngageNY

#### EngageNY Algebra II Module 1: Polynomial, Rational, and Radical Relationships

For Teachers 9th - 12th Standards
The 42 lessons in the Algebra II Module 1 collection are divided into four topics: Polynomials--From Base Ten to Base X, Factoring-- Its Use and Its Obstacles, Solving and Applying Equations—Polynomial, Rational and Radical, and A...
1 In 1 Collection
Lesson Planet

#### Vertical Angles Proof Samples

For Teachers 7th - 10th Standards
This visual, manipulative-based format for teaching geometric proofs nicely scafolds learners' development of mathematical reasoning and proof skills. This sample represents a proof of the congruence of vertical angles in four formats;...
Lesson Planet

#### Reasons for Geometric Statement/Reason Proofs

For Students 8th - 11th Standards
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.
Lesson Planet

#### Proving Supplementary and Complementary

For Teachers 9th - 12th
Students examine their prior knowledge of algebra to explore geometric proof. In this proving supplementary and complementary lesson, students prove a solution to an equation using algebraic properties. Students then write their own...
15:15
Lesson Planet

#### Triangle Medians and Centroids (2D Proof)

For Students 9th - 10th
After addressing the terminology used with medians and centroids of triangles in the first part of this series, the instructor shows how to solve this type of problem. He illustrates the concepts by using a high-level problem....
9:00
Lesson Planet

#### Triangle Medians and Centroids

For Students 9th - 10th
The terminology used in geometry, including such words as centroid and median are discussed in this video. Through this lecture, young mathematicians can see a visual representation both median and centroid. Also, a proof showing how to...
4:38
Lesson Planet

#### Rhombus Diagonals

For Students 9th - 10th
Delving into a proof that the diagonals of a rhombus are perpendicular to each other, this lecture evaluates the angles and sides of this figure. It would serve as a great test preparation activity.
9:00
Lesson Planet

#### Triangle Medians and Centroids

For Students 9th - 10th
The terminology used in geometry, including such words as centroid and median are discussed in this video. Through this lecture, young mathematicians can see a visual representation both median and centroid. Also, a proof showing how to...
4:36
Lesson Planet

#### Area of Diagonal Generated Triangles of Rectangle are Equal

For Students 9th - 10th
Finding the area of each of the triangles that are created by drawing two diagonal lines through a rectangle is explored in this lecture. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use...
4:36
Lesson Planet

#### Area of Diagonal Generated Triangles of Rectangle are Equal

For Students 9th - 10th
Finding the area of each of the triangles that are created by drawing two diagonal lines through a rectangle is explored in this lecture. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use...
11:39
Lesson Planet

#### Area of Inscribed Equilateral Triangle (some basic trig used)

For Students 9th - 12th
Delving into basic trigonometry, this resource shows how to find the area of an inscribed equilateral triangle. Using a high-level problem, HeronÕs theorem is used to find the area of a figure. Prior to SAT testing, use this as a review.
1 In 1 Collection
Lesson Planet

#### Geometry Project

For Students 9th - 12th Standards
Proofs are usually an intimidating assignment. An engaging lesson focused on geometric proofs may reduce the anxiety! Pupils choose between several triangle proofs to complete and work on completing them. The assignment also gives a...
Lesson Planet

#### Diagonally Half of Me!

For Teachers 9th - 12th Standards
Cut straight to the proof. Given cutouts of different quadrilaterals, pupils draw diagonals. Learners cut up the figures along the diagonals to see whether they bisect each other. Scholars develop a geometric proof for the property they...
Lesson Planet

#### Prove Rhombus Diagonals Bisect Angles

For Students 9th - 12th Standards
What do congruent triangles have to do with diagonals of a rhombus? Given a rhombus, pupils develop a proof showing that a diagonal bisects opposite angles. The learners use what they know about congruent triangles to create the...
Lesson Planet

#### Isosceles Triangle Proof

For Students 9th - 12th Standards
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

#### Parallel Lines Proofs Practice

For Students 8th - 11th Standards
Here is a learning exercise that lines up perfectly with the skills needed to finish a geometric proof. Eleven problems are given to see if learners can prove that lines are parallel or angles are congruent.
1 In 1 Collection
Lesson Planet

#### Similar Triangles

For Teachers 9th - 11th Standards
Proving triangles are similar is often an exercise in applying one of the many theorems young geometers memorize, like the AA similarity criteria. But proving that the criteria themselves are valid from basic principles is a great...
Lesson Planet

#### Analytic Geometry Study Guide

For Students 9th - 12th Standards
Are you looking for a comprehensive review that addresses the Common Core standards for geometry? This is it! Instruction and practice problems built specifically for standards are included. The material includes geometry topics from...
Lesson Planet

#### A Geometric Proof

For Students 8th - 11th
In this geometry worksheet, students take the derivative of functions. They prove theorems using geometric proofs. There are 13 questions.