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Lesson Plan
Curated OER

Reflections

For Teachers 5th
Fifth graders create a reflection of a poygon using a Mira. They discover that a line connecting a vertiex of a polygon and the corresponding vertex of its reflection is perpendicular to the line of reflection. Students create a glide...
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Worksheet
Curated OER

Similar Figures

For Students 7th - 9th
For this similar figures worksheet, students identify corresponding sides and corresponding angles of given polygons.  They identify similar figures.  This three-page worksheet contains 18 problems.
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Lesson Plan
Curated OER

SAS Similarity Theorem

For Teachers 9th - 10th
Learners identify and use the similarity theorem. In this geometry lesson, students differentiate between congruent and similar triangles. They solve problems using the computer modifying shapes by dragging.
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Lesson Plan
Curated OER

Shapes Are Everywhere

For Teachers 3rd
Third graders use various shapes to identify polygons and understand symmetry. They explore pattern blocks noticing their similarities and differences, then share with other team members. They draw 3 polygons in their journals and...
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Unit Plan
Mathematics Vision Project

Circles: A Geometric Perspective

For Teachers 10th - 12th Standards
Circles are the foundation of many geometric concepts and extensions - a point that is thoroughly driven home in this extensive unit. Fundamental properties of circles are investigated (including sector area, angle measure, and...
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Lesson Plan
Texas Instruments

Construction Regular Polygons

For Teachers 9th - 12th Standards
Learners investigate the process necessary to construct regular polygons. They explore the degree measures of the angles in a regular polygon. Using this information and technology in the form of Cabri Jr., your pupils will construct...
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Lesson Plan
Curated OER

Mirror Tool

For Teachers 9th - 12th
Students define properties of polygons. In this geometry lesson, students differentiate between similar and congruent polygons. They identify and use the properties of solids to solve problems.
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Lesson Plan
Pennsylvania Department of Education

Creating Polygons

For Teachers Pre-K - 2nd
Pupils describe, make and compare polygons. In this creating polygons lesson, students identify properties of quadrilaterals and describe common features of two dimensional shapes.
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Lesson Plan
Curated OER

Dihedral Figures

For Teachers 6th - 12th
Middle and high schoolers perform transformations. For this web based lesson, students explore dihedral figures. They use the web tools to translate, rotate, and reflect figures. Pupils identify lines of symmetry.
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Lesson Plan
Curated OER

Diagonals to Quadrilaterals II

For Teachers 8th - 10th
Learners identify the properties of different polygons. In this geometry lesson, students find the slope of a line and calculate the distance between two lines. They differentiate between similar and congruent polygons.
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Lesson Plan
Curated OER

The Plane! The Plane!

For Teachers 5th
Fifth graders work with polygons.
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Lesson Plan
Curated OER

Geometry

For Teachers 9th - 11th
Students are introduced to the basics of Geometry. Using cutout shapes, they identify whether they are polygons by using the properties of polygons. They practice drawing shapes they are going to be using on an everyday basis and...
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Lesson Plan
Curated OER

Congruence with Robot Gobot

For Teachers 8th - 10th
Students identify the properties of solids and polygons. For this geometry lesson, students identify the different measurements of a triangle. They use congruence parts and theorem to prove their answer.
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Lesson Plan
Pennsylvania Department of Education

Making Triangles

For Teachers Pre-K - 2nd
Pupils use interactive geoboards to identify simple geometric shapes. In this making triangles lesson plan, students describe the properties associated with geometric shapes. Pupils develop spatial sense and the mathematical meaning of a...
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Lesson Plan
Curated OER

Governor's Garden

For Teachers 9th - 12th
Students review types of polygons and list several examples of each. They assume the role of a landscape artist interviewing for a job. They create sketches of their plans for six polygonal gardens and write an expository paragraph...
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Lesson Plan
Curated OER

Tessellations: Geometry and Symmetry

For Teachers 9th - 12th
Students examine tesselllations and their geometric properties. They have a better knowledge of polygons, can identify types of symmetry in tessellations. Also students use visulization, spatial reasoning, and geometric modeling to...
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Lesson Plan
Curated OER

SuperShapes, Part 1; "Tri"ing Triangles

For Teachers 5th - 6th
An outstanding lesson on triangles awaits your math scholars. Learners focus on the triangle, which is the strongest of all polygons. They see the role that triangles play in the design of buildings, and learn about triangle...
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Lesson Plan
Curated OER

Symmetry of Road Signs

For Teachers 8th - 11th
Students identify symmetry in road signs. In this geometry instructional activity, students explore objects in the real world for symmetry. They perform translation, rotation and reflection.
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Lesson Plan
Curated OER

Area And Perimeter Using Pentominoes

For Teachers 3rd
Third graders engage in an enrichment lesson exploring the concepts of area and perimeter. They construct new pentominoes that are 3 times the size of normal ones and then identify the area and perimeter measurements. They then create a...
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Worksheet
Curated OER

Six Exercise Sets on Transformations

For Students 8th - 11th Standards
Middle and high schoolers solve fifteen problems from six exercise sets covering transformations, reflections, rotations, and enlargements. The solutions are provided.
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Lesson Plan
Curated OER

Properties of Parallelograms

For Teachers 9th - 12th Standards
High schoolers discover properties of parallelograms as they construct a parallelogram using Cabri Jr. They will measure angles and side lengths of their construction and determine the relationship between the diagonals of a...
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Lesson Plan
Curated OER

Triangles in Architecture

For Teachers 10th - 12th
Learners find triangles in the real world. In this geometry lesson, students analyze and identify properties of two and three-dimensional objects. They differentiate between similarity and congruence.
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Lesson Plan
Curated OER

Compass Designs

For Teachers 8th - 10th
Young scholars investigate the properties of two and three dimensional objects. In this geometry lesson, students differentiate polygons based on similarity and congruence. They make observation and interpret the data.
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Lesson Plan
Curated OER

Measuring Body Angles

For Teachers 8th - 10th
Learners use technology to graph and compare angles. In this geometry lesson, students range of motion in the environment. They identify the missing parts of polygons using similarity and congruence.