Curated OER
Regular Polyhedra
Tenth graders investigate the history of geometry and its different shapes. In this geometry lesson plan, 10th graders practice seeing three dimensional shapes and explain why there are only five polyhedra. They relate all the new...
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Why Doesn't SSA Work?
Students investigate the relationship between angles and their sides. In this geometry activity, students prove why SSA does not work as a true angle side relationship theorem.
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Which Triangles are Right
Students apply properties of right triangles to solve problems. In this geometry lesson, students identify axioms and theorems using examples.
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Shape Hunt
Students explore two-dimensional and solid shapes. In this shapes and patterns geometry lesson, students work with a partner to create identifiable objects using tangrams. Students describe the attributes of their shape and their partner...
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Area Unit
Students solve the area for parallelograms,squares, rectangles, trapezoids, and triangles. In this geometry lesson, students compare and contrast two dimensional shapes and apply their properties to solving real life scenarios. This is a...
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Measurement
Students measure angles, perimeter, area and volume. In this geometry instructional activity, students define different ways to measure and solve for the perimeter, area and volume of geometric shapes. They analyze and process...
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Shape Collage Pizza
Students identify shapes. In this geometry lesson, students cut out various shapes and create a "Shape Collage Pizza." Students glue their shapes onto a pizza template.
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Area
Young scholars solve problems involving area. In this geometry lesson, students calculate the area of an object and relate it to the area of the ocean. They define what exactly and area is and then solve problems relating to the real world.
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Amazing Fibonacci
Students integrate the patterns of Fibonacci into music. In this geometry lesson plan, students apply the concepts of recursion, pattern and Phi or Golden Ratio to composing and playing music on various instruments. They lesson plan is...
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Deric's Blotto
Young scholars solve the handshake problem and investigate triangular numbers. In this geometry lesson, students investigate Blotto games as they apply concepts of triangles and geometric theorems.
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Areas and Volumes
Tenth graders calculate the area and the volumes of polygons. In this geometry lesson plan, 10th graders review the formulas used to solve for the area and volume and explain to the class how they arrived at their answer. They search...
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Graphing Data
Young scholars graph lines in a coordinate plane. In this geometry lesson plan, students graph lines on a coordinate plane, and identify the slope. They calculate the volume, area and perimeters of the shapes created on a coordinate plane.
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Inequalities and Triangles
Students prove and apply theorems of triangle inequality and hinge theorem. In this geometry lesson plan, students will discuss which triangle is bigger and why. They will use theorems, such as Exterior Angle Inequality or the...
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Surface Area and Measuring
Tenth graders explore volume and surface area through percentages. In this geometry instructional activity, 10th graders analyze the surface area of two and three dimensional shapes, then use percents and ratio to compare the two.
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Triangle Inequality Theorem
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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Scale Drawing
Students use ratio and proportions to solve problems. In this geometry lesson, students apply ratio and proportions to real life scenarios.
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Shapes
Students identify attributes of different geometric shapes. In this geometry lesson, students view a PowerPoint presentation on shapes and use attribute blocks to examine the corners and edges of each shape. Students work together...
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Patterns
Students explore simple patterns. In this mathematical thinking geometry lesson, students repeat clapping and snapping patterns, and determine what comes next in sound and movement patterns. Students recite "Hey, Diddle,...
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Deductive and Inductive Reasoning
Students differentiate between inductive and deductive reasoning. In this geometry lesson, students identify congruent figures and examine logos for congruency.
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Exploring Geometry and Algebra using Cabri Jr. Application.
Learners solve geometric problems with algebra and graphing in this lesson plan. They will prove the bisectors theorem using the Cabri Jr. application, which requires Cabri on their TI.
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Loopy Geometry
Students explore geometric shapes by creating them through paper. In this geometric shape lesson, students bend, cut and shape paper to create geometric shapes. Students discover how many ways they can produce new shapes....
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Identify Polygons: Algebra/Geometry Institute
Eighth graders classify geometric figures. In this polygon lesson, 8th graders identify given geometric figures. They compare and contrast different polygons. Students name line segments, identify parallel lines, and...
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Pythagorean Theorem: Algebra/Geometry Institute Summer 2010
Learners solve Pythagorean theorem problems. in this Pythagorean theorem lesson, students read real world problems, draw diagrams, and then solve with the Pythagorean theorem. They define hypotenuse and leg. learners...
EngageNY
Parallel and Perpendicular Lines
Use what you know about parallel and perpendicular lines to write equations! Learners take an equation of a line and write an equation of a line that is parallel or perpendicular using slope criteria. They then solve problems to...
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