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Lesson Plan
Curated OER

Triangle Inequality Theorem

For Teachers 8th - 10th
Students use the inequality theorem to solve triangles and their properties. In this geometry lesson, students are given spaghetti of different lengths and asked to create triangles. They conclude the necessary length needed to make a...
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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...
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Lesson Plan
Curated OER

Shaping Up with Nature at Black Bayou Lake

For Teachers 1st - 2nd
Students visit a local lake refuge and identify shapes they find in nature. They take pictures of the various shapes and use KidPix to draw shapes around the shapes in the pictures. They watch a slideshow of all the shapes found by their...
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Lesson Plan
Curated OER

Rep Tiles

For Teachers 3rd
Third graders use pattern blocks of one shape at a time to try to create a similar shape. They compare the perimeter of the new figure with the perimeter of the original shape and look for a pattern. Students use the pattern to predict...
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Worksheet
Curated OER

Tessellations

For Students 10th
In this tessellations worksheet, 10th graders solve 6 different types of tessellation problems that includes drawing. First, they define polygon, regular polygon, tessellation, regular tessellation, and semi-regular tessellation. Then,...
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Lesson Plan
Curated OER

Geo-Critters (Geometry Critters)

For Teachers 2nd - 5th
Students read the book The Math Curse by Jon Scieszka and study geometry. In this geometry lesson, students identify geometric shapes and their properties. Students create a geo-critter.
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Lesson Plan
Pennsylvania Department of Education

Rotational Symmetry of Polygons and Other Figures

For Teachers 5th - 8th
Students explore geometry by participating in a shape rotation experiment. In this symmetry lesson, students identify the term symmetry and a list of other geometry vocabulary. Students analyze shapes as they are turned 90 degrees and...
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Lesson Plan
Curated OER

Teaching the Bell Tetrahedral Kite

For Teachers 4th - 8th
Students complete readings on kite making and kite flying. They analyze how the parts of a system interconnect and influence each other. Students identifies and uses color and form in a 3D artwork.
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Lesson Plan
Curated OER

Tangent Properties

For Teachers 9th - 12th
Students explore properties of tangent lines.  In this properties of tangent lines lesson, students discuss the perpendicular relationship between a tangent line on a circle and the circle's radius.  Students use that...
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Lesson Plan
Curated OER

Understanding Fundamental Trigonometric Identities

For Teachers 9th - 12th
Learners are introduced to the basic trigonometric identities. Using a diagram, they discover why the parts of the unit circle as named as they are and use equations to finalize the Pythagorean trigonometric identities. They also review...
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Lesson Plan
Curated OER

Parallel-o-Home

For Teachers 9th - 12th
High schoolers investigate the usage of parallel and perpendicular shapes in the real world. In this geometry lesson, students investigate shapes for properties that are related to the real world. They relate all the properties of shape...
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Lesson Plan
Curated OER

Polygons All Around Us!

For Teachers 9th - 12th
Young scholars explore the concept of polygon properties. In this polygon properties lesson, students draw polygons with different numbers of sides such as pentagons, octagons, hexagons, etc. Young scholars identify different geometric...
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Lesson Plan
Curated OER

Teaching the Tr'panier Trapezoid Kite

For Teachers 3rd - 6th
Students analyze how the parts of a system go together and how these parts depend on each other. They comprehend the forces in terms of strength and direction. Students observe, measure and describe weather indicators.
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Lesson Plan
Curated OER

Plain Figures And Measuring Figures

For Teachers 7th
Seventh graders investigate the mathematical concept of a sector. They apply the concept to an example problem and then move into a more complex application. They find the area of the side of a cone. This is done as students calculate...
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Activity
Oswego City School District

Regents Exam Prep Center: Copy a Line Segment and an Angle

For Students 3rd - 8th Standards
This site provides a step-by-step method to construct congruent segments and angles with a straight edge and compass.
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Lesson Plan
Texas Instruments

Texas Instruments: Investigate Triangles and Congruence

For Teachers 9th - 10th Standards
Students can use the TI-84 Plus family with Cabri Jr. to prove triangle congruence with SSA.
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Activity
Texas Instruments

Texas Instruments: Exterior Angle and Side Angle Relationships

For Teachers 9th - 10th
This activity will help students visualize the relationships that arise when some of the congruence conditions are true but one is not. The interactive nature of their constructions will permit them to explore these relationships in a...
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Activity
Texas Instruments

Texas Instruments: Got Parallel Lines With Corresponding Angles Congruent? With

For Teachers 9th - 10th Standards
Construct parallel lines in Cabri Jr., and students label and check if all corresponding angles are congruent.
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Activity
Texas Instruments

Texas Instruments: Isosceles Triangle

For Teachers 9th - 10th Standards
In this activity, students construct isosceles and equilateral triangles. They discover that if two sides of a triangle are congruent, then the angles opposite them are congruent. They understand that an equilateral triangle is also...