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### We found 514 resources with the concept 2-d

Lesson Planet: Curated OER

#### Sorting 2-Dimensional Shapes

Explore shape attributes with young geometers as they sort nine shapes based on their corners. Scholars determine whether or not each shape has a square corner, drawing it in the appropriate space accordingly. They are encouraged to use...

Lesson Planet: Curated OER

#### Square Corners

Which ones are square corners? As they learn more about shape attributes, be sure scholars understand the difference between a vertex and a square corner. After examining two examples, learners circle the 90-degree corners in 12...

Lesson Planet: Curated OER

#### Dihedral Figures

Middle and high schoolers perform transformations. In this web based lesson, students explore dihedral figures. They use the web tools to translate, rotate, and reflect figures. Pupils identify lines of symmetry.

Lesson Planet: Curated OER

#### Transformations - Rotations in the Coordinate Plane

In this geometry lesson plan, math scholars brainstorm examples of rotations. Using the SMARTboard, students observe a rotation. They create their own rotation using graph paper. Finally, pupils complete a worksheet and graph rotations.

Lesson Planet: Curated OER

#### Visual Patterns in Tessellations

Geometers explore the concept of tessellations. They use a tessellation applet to manipulate shapes and design their own tessellation using the applet.

Lesson Planet: Curated OER

#### 2-Dimensional Shapes: Drawing Shapes

Some of the best practice with shape identification comes from drawing the figures first-hand. Young geometers draw nine two-dimensional shapes: rectangle, circle, square, pentagon, hexagon, octagon, triangle with three equal sides,...

Lesson Planet: Curated OER

#### Hands-On: Sums of Angle Measures

In this angle measures worksheet, students solve six word problems where they are given 6 different polygons, some of which are complex, and must determine angle measures in order to arrive at a solution.

Lesson Planet: Curated OER

#### The Shape Show

Define plane shapes by their properties, then use this game to reinforce those skills. Learners use given properties as clues to determine each shape. They work to name ten different shapes, six of which are polygons.

Lesson Planet: Curated OER

#### 1.2 Points, Lines and Planes

This is a lengthy overview PowerPoint that defines, explains, shows examples, and has practice problems about points, lines and planes. The class will need to write many notes and there is an example of how to set up in the Cornell...

Lesson Planet: Curated OER

#### Year 5 Unit 2b

This slide-show is packed with information relating to a variety of mathematical concepts. Intended as an accompaniment to a full unit, this resource provides definitions, explanations, and opportunities for learners to practice their...

Lesson Planet: Curated OER

#### Classifying Polygons

A straight edge, a right angle, a number of vertices; sounds like it's time to classify polygons. That's right you and your class will learn all about the properties of polygons and how to classify them with this easy to follow...

Lesson Planet: Curated OER

#### 2D Shapes

This engaging presentation would be helpful for your young learners of geometry. Pupils are given clues as to what a shape may be, then they have to use those clues to guess what shape is being described. Shapes used are the circle,...

Lesson Planet: Curated OER

#### Measures Combined

Use this resource to teach perimeter of regular plane shapes, measurement, rounding, and systematic problem solving skills. There are 78 complete slides and two game suggestions intended to facilitate content understanding.

Lesson Planet: Curated OER

#### Year 5 Unit D1

This presentation is intended to accompany an entire unit and covers a wide variety of concepts. Counting on, counting back, symmetry, properties of 2-D shapes, completing symmetrical patterns, and measuring angles are all covered.

Lesson Planet: Curated OER

#### Building Big and Strong

Middle and high schoolers explore the concepts of architectural rigidity. They analyze a variety of polygons, and explain why some shapes add more strength to structures than others. The PBS video, "Building Big," is utilized in this plan.

Lesson Planet: Curated OER

#### Poly-Mania

This hands-on instructional activity takes young geometers on a tour of 2D polygons and 3D polyhedrons. After exploring different web resources and discussing geometric shapes, small groups construct models of polyhedrons using bendable...

Lesson Planet: Curated OER

#### Calculating and Measuring Perimeters of Polygons

If you're teaching 3rd or 4th grade math, this presentation is a must have. It defines perimeter and polygons, then describes the process by which perimeter is determined through pair share discussion and critical thinking questions....

Lesson Planet: Curated OER

#### Measuring Area: Sensible Flats

Here's how to calculate the areas of polygonal figures. In this measuring area activity, upper graders use hash marks to create and count square units. They also problem solve a cyberchase activity watching Quicktime videos.

Lesson Planet: Curated OER

#### "Polly"gon Pockets

Explore polygons with your elementary learners. Divide the class in 12 to configure the polygon puzzle before them. They list the attributes of each type of polygon they see, and if there's time, they jump on the interactive website...

Lesson Planet: Curated OER

#### The Very Busy Spider

Youngsters explore visual arts by participating in a geometry identification activity. They read the book The Very Busy Spider and identify the techniques spiders use to create webs. Have you ever noticed that their webs are geometric...

Lesson Planet: Curated OER

#### Create, Classify, and Sort Quadrilaterals

Quadrilaterals can be quirky! Fourth graders use geoboards and bands to create four-sided figures. They analyze the attributes such as angle size and presence of parallel sides. As a result they learn to differentiate among rectangles,...

Lesson Planet: Curated OER

#### Can You Name That Shape?

Learners use materials to build, investigate, and draw two-dimensional shapes (polygons). They combine the shapes they have built and draw from the pile to begin a round-robin activity to name and determine the attributes of a selection...

Lesson Planet: Curated OER

#### Mirror, Mirror

Geometry students use hinged mirrors to discover that the regular polygons are composed of triangles tessellating around a center point. They sketch triangles on paper models of the regular polygons having 3 to 10 sides and compute the...

Lesson Planet: Curated OER

#### The Greedy Triangle-Intro to Geometric Shapes

In this geometry lesson, learners read The Greedy Triangle and use geoboards to construct geometric shapes. They identify the number of sides and angles each shape has.