Lesson Plan
Curated OER

Exploration with Geometric Solids

For Teachers 3rd - 5th
Students reinforce geometric concepts by playing "Guess My Solid." Through a process of elimination, they determine the shapes of mystery solids. Finally, students use various materials to construct their own geometric figures.
Lesson Plan
Curated OER

Teaching Polygons using Technology

For Teachers 3rd
Third graders utilize different types of computer programs, such as Microsoft paint and Microsoft Word to study and create different types of polygons. They use PowerPoint to create a story about a shape and others that it meets during a...
Worksheet
Curated OER

Polygon Sum Conjecture

For Students 10th
In this geometry activity, 10th graders identify the missing angles using the polygons sum conjecture. They measure exterior and interior angles using their angle theorems. There are 63 problems.
Lesson Plan
Curated OER

Exploring Area and Perimeter

For Teachers 4th - 6th
Two students are blindfolded and each receives a cardboard square, one with pompoms glued around the edge and one with pompoms glued all over the surface. They identify what they feel. The class discusses perimeter and area of polygons....
Worksheet
Curated OER

Angles in Polygons

For Students 10th - 12th
For this angles in polygons worksheet, students determine the value of a missing angle measure. They find the value of interior angles and exterior angles. Polygons include triangles, quadrilaterals, pentagons, and hexagons. This...
Unit Plan
Mathematics Vision Project

Module 6: Congruence, Construction, and Proof

For Teachers 8th - 10th Standards
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...
Lesson Plan
Curated OER

Pattern Block Fractions

For Teachers 4th
Fourth graders participate in a activity that is about the finding of different fractional sizes with the help of pattern blocks. They define the vocabulary terms of numerator and denominator. The activity also uses geometry and relates...
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.
Lesson Plan
Curated OER

Algebraic Processes And Its Connection To Geometry

For Teachers 6th - 8th
Students investigate the concept of polygons using a variety of activities. They explore the vocabulary of polygons by constructing a graphic organizer. Then students categorize the characteristics of several polygons and contribute the...
Lesson Plan
Curated OER

Tessellations: Geometry and Symmetry

For Teachers 9th - 12th
High schoolers 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...
Lesson Plan
Curated OER

Algebra/Geometry Institute: Area of Polygons

For Teachers 6th - 8th
Students find the area of polygons.  In this area of polygons lesson, students find the area of parallelograms, rectangles, squares, and other polygons.  They identify each given figure and determine the appropriate formula...
Worksheet
Curated OER

Identify Angles: Obtuse, Right, Straight and Acute

For Students 5th - 6th
In this triangle worksheet, learners identify angles as either obtuse, right, straight or acute. A reference web site is given for additional activities.
Worksheet
Curated OER

Graph Study

For Students 5th - 6th
For this geometry skills worksheet, students examine a graph and respond to 5 questions that require them to identify the coordinate pairs of object on the grid.
Worksheet
Curated OER

January Worksheets: Number Book

For Students 1st - 2nd
In this lower elementary geometry worksheet, students make a shape book. They receive a book with the outline of a circle, triangle, square, and rectangle with the word that names the shape. They cut out images of the four shapes and...
Worksheet
Curated OER

Interior and Exterior Angles of Polygons

For Students 10th
In this angles of polygons worksheet, 10th graders solve and complete 18 different problems that include determining various interior and exterior angles. First, they determine the measure of various angles described in the first half of...
Lesson Plan
Curated OER

Polygon Quilt

For Teachers 3rd - 5th
Students participate in a game with different types of polygons. They use triangles to create as many polygons as possible. They also review their colors by having different polygons be a different color.
Lesson Plan
Curated OER

Circumscribed Polygons

For Teachers 9th - 10th
Young scholars investigate polygons and construct ferris wheels. In this geometry lesson, students create a circle and differentiate properties of circles and polygons. They compare the relationship between angles and circumscribed...
Worksheet
Curated OER

Find the Area or Missing Length of the Polygon

For Students 7th - 10th
In this area and perimeter worksheet, students find the length or area of seventeen figures.  The figures examined are triangles, trapezoids, parallelograms, rectangles, and hexagons.  Some examples and solutions are...
Lesson Plan
Curated OER

Tessellations: Identify Common Shapes That Tessellate

For Teachers 6th - 8th
Young scholars explore tessellations. They are shown a selection of shapes. Students identify shapes that tessellate and justify their answer. Young scholars create their own tessellation.
Lesson Plan
Curated OER

Tessellations: Use Angles To Show That Shapes Will or WIll Not Tessellate

For Teachers 6th - 8th
Students observe a selection of shapes. They identify which shapes will tessellate and justify their answer. Students apply the symmetry and angle properties of polygons to create tessellations.
Lesson Plan
Ohio Department of Education

Describing and Creating Plane Figures - Grade One

For Teachers K - 2nd Standards
Young mathematicians draw, create, and describe different shapes using triangles. They discuss attributes of the original and created shapes. Pupils classify the created shapes and draw and write in mathematics journals to communicate...
Lesson Plan
Shodor Education Foundation

Pythagorean Theorem

For Teachers 8th - 10th Standards
Most adults remember learning about the Pythagorean theorem, but they don't all remember how to use it. The emphasis here is on developing an intuitive understanding of how and when to use the theorem. Young mathematicians explore...
Lesson Plan
EngageNY

Properties of Area

For Teachers 9th - 10th Standards
What properties does area possess? Solidify the area properties that pupils learned in previous years. Groups investigate the five properties using four problems, which then provide the basis for a class discussion.
Lesson Plan
Curated OER

Ratios for Area and Volume

For Teachers 5th - 8th
In this ratios for area and volume worksheet, students solve problems where they find the ratios for problems of shapes dealing with area and volume. Students complete 4 problems.