partners with
&
####
Now... gain access to over

####
Now... gain access to over
**2 Million**
curated educational videos and
**500,000**
educator reviews to free & open educational resources

### We found 29 reviewed resources

Videos (Over 2 Million Educational Videos Available)

3:11

Defining Gravity

9:28

Ancient Egypt | What Everyday Life Was...

5:25

Language and Creativity

Other Resource Types
(29)

Lesson Planet: Curated OER

#### Geometry Unit 4: Triangle Congruence

The Geometry Unit 4: Triangle Congruence unit module contains five lessons—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 OER

#### Geometry Definitions

Geometry is full of shapes, figures, and corresponding things here and there. The guide shares all of the key pieces of geometric information in a nicely color-coded and labeled sheet.

Lesson Planet: Curated OER

#### Analyzing Congruence Proofs

Looking at numerous examples of triangles, each with different properties, geometers develop their understanding of congruency. They use the notation of a counter-example to disprove certain conjectures and prove geometric theorems and...

Lesson Planet: Curated OER

#### Dilations in the Plane

Tenth graders investigate dilations and explore the dilation transformation before investigating the properties of a dilation using Cabri Jr. Students extend the concept of dilatation to the coordinate plane.

Lesson Planet: Curated OER

#### Unit 4 Review: Triangle Congruence

It's time to prove one's knowledge of triangle congruence proofs. Scholars watch a video to review triangle classifications and how to use properties of triangles to set up and solve equations for missing values. They also review the...

Lesson Planet: Curated OER

#### Triangles

Take time to tackle triangles. Scholars watch a video that first reviews the types of triangles. They then investigate the Isosceles Triangle Theorem and see how to apply it to solve problems. At the end, individuals also learn how to...

Lesson Planet: Curated OER

#### Congruent Triangles

Young mathematicians learn about the many theorems related to congruent triangles. The video allows them to stop and replay the content as many times as needed to take notes. Extra practice problems work as reinforcement for each skill...

Lesson Planet: Curated OER

#### Module 2: Congruence, Construction and Proof

Construct yourself a winning geometry unit. A set of lessons introduces geometry scholars to constructions and proofs with compasses and straightedges. It also covers triangle congruence through transformations. This is the second of...

Lesson Planet: Curated OER

#### Congruent Triangles: Lesson

Given two congruent triangles, the resource provides the definition of congruent triangles and marks the corresponding parts. The portion of a basic geometry playlist shows the triangles are congruent by moving one on top of the other...

Lesson Planet: Curated OER

#### Congruence, Construction and Proof

Learn about constructing figures, proofs, and transformations. The seventh unit in a course of nine makes the connections between geometric constructions, congruence, and proofs. Scholars learn to construct special quadrilaterals,...

Lesson Planet: Curated OER

#### Between the Lines

Explore linear and square dimensions by comparing areas of similar figures. A creative set of five activities designed for elementary through high school classes asks young scholars to compare areas of specific polygons. The first two...

Lesson Planet: Curated OER

#### Ratios and Proportions with Congruent and Similar Polygons

Investigate how similar and congruent figures compare. Learners understand congruent figures have congruent sides and angles, but similar figures only have congruent angles — their sides are proportional. After learning the...

Lesson Planet: Curated OER

#### Congruent Triangles Applications

Triangles are all about threes, and practicing proving postulates is a great way to get started. The first page of the worksheet provides a brief introduction of the different properties and postulates. The remaining pages contain...

Lesson Planet: Curated OER

#### Geometry Sample Problems

I'd like to prove that this worksheet has a lot to offer. Seven problems using triangles and parallelograms practice the traditional method of a two-column proof. After the worksheet is some practice problems that show worked out...

Lesson Planet: Curated OER

#### Analytic Geometry Study Guide

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: Curated OER

#### Module 6: Congruence, Construction, and Proof

Trace the links between a variety of math concepts in this far-reaching unit. Ideas that seem very different on the outset (like the distance formula and rigid transformations) come together in very natural and logical ways. This unit...

Lesson Planet: Curated OER

#### Sine, Cosine, and Tangent Practice

Your learners will get plenty of practice finding the sine, cosine, and tangent values and angles in this well-organized worksheet. Given right triangles with their various side lengths and angles labeled, learners find the sine, cosine,...

Lesson Planet: Curated OER

#### Reflections and Equilateral Triangles II

Given the lines of symmetry in an equilateral triangle, your learners find where the pre-image vertices are mapped onto the new image. They explore the properties of equilateral triangles, the impact of reflections, and the idea that the...

Lesson Planet: Curated OER

#### Reflections and Equilateral Triangles

Your learners collaboratively find the lines of symmetry in an equilateral triangle using rigid transformations and symmetry. Through congruence proofs they show that they understand congruence in terms of rigid motions as they prove...

Lesson Planet: Curated OER

#### Similarity and Dilations - Discover Properties of Similar Figures

Learners investigate properties of similar figures. In this properties of similar figures lesson plan, pupils construct similar figures using Cabri Jr. They dilate their figure to create a similar one, and discuss the relationships...

Lesson Planet: Curated OER

#### Reflections and Isosceles Triangles

Geometers explore symmetries of isosceles triangles by using rigid transformations of the plane. They complete four tasks, including congruence proofs, which illustrate the relationship between congruence and rigid transformations. The...

Lesson Planet: Curated OER

#### Transformations: Translations

Learners perform transformations and translations using polygons. In this geometry lesson, students perform transformations on a coordinate plane. They identify the image and pre-image of each figure.

Lesson Planet: Curated OER

#### Tessellations with Regular Polygons

Show your learners how to create tessellations using different polygons. This is achieved by having students make observations of polygons to find the ones that will tessellate.

Lesson Planet: Curated OER

#### Exploring Transformations: Translations and Reflections

Learners perform translation and reflection. They identify the coordinate points of the new graph and create a formula for the movement. They identify the pre-image the and after image.