Lesson Plan
Curated OER

Classifying Quadrilaterals

For Teachers 4th - 8th
Students cut out three different shapes and put them in the correct categories of parallelograms, trapezoids, and trapeziums. In this parallelogram lesson plan, students explain the sums of the angles of a triangle and a quadrilateral.
Worksheet
Curated OER

Classify and Measure Angles #3

For Students 2nd - 3rd
In this angles worksheet, students classify and measure 2 simple angles. Worksheet is part of a site with additional activities and links.
Worksheet
Curated OER

Classify and Measure Angles #5

For Students 2nd - 3rd
In this angles worksheet, students classify and measure 2 simple angles. Worksheet is part of a site with additional activities and links.
Worksheet
Curated OER

Classify and Measure Angles #1

For Students 2nd - 3rd
In this angles worksheet, students classify and measure 2 simple angles. Worksheet is part of a site with additional activities and links.
Lesson Plan
Curated OER

Classify and Measure Angles #2

For Teachers 2nd - 3rd
In this angles worksheet, students classify and measure 2 simple angles. Worksheet is part of a site with additional activities and links.
Organizer
Curated OER

Quadrilaterals

For Students 5th - 6th
In this solving quadrilateral word problems learning exercise, students draw figures to identify quadrilaterals, use angles to find the ones missing, and explain classification. Students solve six problems.
Lesson Plan
Curated OER

Investigating the properties of a circle

For Teachers 7th - 10th
Students use wax paper to look at different properties of circles such as chords, tangent lines, inscribed angles, and inscribed angles in a semi-circle, as well as finding the center of the circle, and use GSP to investigate cyclic...
Worksheet
Curated OER

Informal Geometry

For Students 8th - 12th
Middle and high schoolers solve and complete 29 various types of problems. First, they match each name with its correct formula. Then, students find the length of the missing side and the distance between the two points given. In...
Lesson Plan
Curated OER

Exploring Geometric Figures

For Teachers 10th
Tenth graders explore mathematics by participating in hands-on daily activities. Learners identify a list of different shapes and classify them by shape, size, sides and vertices. They utilize tangrams and geometric pieces to gain...
Lesson Plan
Shodor Education Foundation

An Introduction To Quadrilaterals

For Teachers 3rd - 7th Standards
Young geometers investigate and apply properties of quadrilaterals.  After a review and discussion of key terms, students use a computer applet to explore four-sided figures and classify them according to their attributes. The...
Lesson Plan
Curated OER

CORNER CABINET

For Teachers 9th - 10th
Ninth and tenth graders calculate the length, width, height, perimeter, area, volume, surface area, angle measures or sums of angle measures of common geometric figures. They solve problems involving scale drawings, models, maps or...
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
Virginia Department of Education

Exploring Quadrilaterals

For Teachers 6th
Sort this resource into the Use pile. Scholars investigate attributes of quadrilaterals and then use the results to sort and classify the shapes labeling each figure with their properties to justify the classifications.
Unit Plan
Curated OER

Connecting Algebra and Geometry Through Coordinates

For Teachers 9th - 10th Standards
This unit on connecting algebra and geometry covers a number of topics including worksheets on the distance formula, finding the perimeter and area of polynomials, the slope formula, parallel and perpendicular lines, parallelograms,...
Lesson Plan
Curated OER

Geometry in Tessellations

For Teachers All
Students examine tessellations and their geometric properties. Students also develop a better understanding of lines, planes, angles, and polygons.
Worksheet
Curated OER

Parallel, Intersecting, and Perpendicular Lines

For Students 10th
In this geometry lines activity, 10th graders solve 9 different problems related to various types of lines found in geometry. They classify each pair of lines shown as either parallel, intersecting, or perpendicular lines.
Lesson Plan
Curated OER

Scalene Triangles

For Teachers 5th
Fifth graders identify and classify scalene, equilateral, and isosceles triangles. In this triangle lesson, 5th graders define the different attributes of 3 types of triangles and sort them by descriptions and...
Lesson Plan
Curated OER

Sampling Rocks

For Teachers K - 2nd
Students examine rocks. In this geology lesson, students collect rocks from the schoolyard and classify them by color, weight, and size. Students use a rock guide to identify each of the rocks.
Lesson Plan
Curated OER

Classifying Polygons

For Teachers 7th
Seventh graders participate in a polygon hunt.  In this polygon lesson, 7th graders examine how polygons are alike and different.  Students create a Venn diagram and label the sorting circles.  Students work in cooperative...
PPT
Curated OER

Exploring and Classifying Polygons

For Teachers 3rd - 4th Standards
Not particularly coloful, but definitely informative, here is an introductory presentation on polygons. The basic shapes are covered, from triangles to decagons. Special polygons like the trapezoid and the rhombus are also covered. Not...
Lesson Plan
Curated OER

Nets And Surface Area

For Teachers 4th - 6th
Upper graders investigate how to find the surface area when using two-dimensional shapes. They conduct an investigation in groups while working sample problems given during class discussion with the teacher. They also review how to...
Lesson Plan
Curated OER

Property Lists for Quadrilaterals

For Teachers 9th - 12th
Young scholars establish classifications of shapes by various properties (angles, sides, etc.). They introduce the important properties of common shapes. Students develop an awareness of the wide variety of ways the 2-D shapes can be alike.
Lesson Plan
Curated OER

Shapes in Our World

For Teachers 1st - 3rd
Help your students explore shapes. They classify shapes and identify them in their everyday world. Plane shapes are explored, and they classify and identify the plane shapes.
Lesson Plan
Curated OER

Connecting Formulas Related to Geometric Figures

For Teachers 8th - 12th
Young scholars identify diagrams of quadrilaterals and circles by different names and classify the figures. They name the areas for each diagram and practice solving the formulas for each.

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