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Exploring Properties of Rectangular Prisms

For Teachers 8th - 10th
Students explore the properties of rectangular prisms. In this geometry instructional activity, students identify properties of two and three dimensional shapes. They use Cabri technology to create polygons and solve problems.
Lesson Plan
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Pythagorean Theorem: Triangles and Their Sides

For Teachers 8th - 10th
Learners investigate triangles and their relationship to each other. In this geometry lesson, students solve right triangles using the properties of the Pythagorean Theorem. They differentiate between right, acute, straight and oblique...
Lesson Plan
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Solid Figures

For Teachers 9th - 11th
Students investigate solids. In this geometry lesson, students use toothpicks and gum drops to solve problems. They create visuals to help them see what is happening to the shapes.
Lesson Plan
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Examining Geometric Solids

For Teachers 7th - 10th
Students explore geometry by completing a math worksheet in class. In this shape identification lesson, students identify the characteristics associated with 15 solid geometric shapes. Students identify patterns between vertices, edges...
Lesson Plan
West Contra Costa Unified School District

Finding the Equation of a Circle

For Teachers 9th - 12th Standards
Tired of going around and around for a resource on circles? Scholars determine the general equation of a circle on a coordinate plane, then participate in an activity matching equations to the radii and centers of the circles...
Lesson Plan
West Contra Costa Unified School District

Introduction to Trigonometric Functions

For Teachers 9th - 12th
Scholars first learn the definitions of the sine ratio, the cosine ratio, and the tangent ratio. After mastering these definitions, they use the new information to solve triangles.
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Isosceles Triangles

For Teachers 9th - 10th
Students identify the properties of an isosceles triangle. In this geometry activity, students find the midpoint, median and angle bisector of a triangle. They construct angle bisectors and measure missing angles.
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Compound Locus

For Teachers 7th - 10th
Students investigate circles and compound locus. In this geometry lesson, students identify the distance from a point to a line. They use Cabri software to create lines and circles.
Lesson Plan
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Inscribed Angles

For Teachers 9th - 10th
Students calculate the inscribed angle of a triangle. In this geometry lesson, students identify the angle created by intersection of a triangle and a circle. They see the relationship between the arc and the angle.
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Pick's Theorem

For Teachers 9th - 10th
Young scholars investigate Pick's theorem by completing a lab. In this geometry lesson plan, students construct polygons using cabri software. They calculate the area of polygons and identify the vertices of each shape.
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Exploring Geometric Mean

For Teachers 8th - 10th
Students solve problems using geometric means. In this geometry activity, students create altitudes in right triangles. They use Cabri software to move the triangle around and observe different sides and angles.
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Exploring Geometric Mean

For Teachers 8th - 10th
Student identify the solution using geometric mean. In this geometry lesson, students create right triangles where the altitude of the triangle is the side containing the right angle. They modify shapes using Cabri software and observe...
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Exploring the Slopes of Parallel and Perpendicular Lines.

For Teachers 8th - 10th
Students find the slopes for perpendicular and parallel lines. In this geometry lesson, students differentiate between parallel and perpendicular lines. They use Cabri software to create lines to compare.
Lesson Plan
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Classifying Polygons

For Teachers 1st - 3rd
Students study polygons. In this math lesson, students play a game in which they learn the classification system for polygons. Students identify the properties of quadrilaterals.
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Pythagorean Theorem Practice

For Teachers 7th - 10th
In this geometry skills worksheets, students examine 10 triangles and use the Pythagorean theorem to identity the lengths of the missing units.
Lesson Plan
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Triangles & Congruence, Proportions & Similarity, Right Triangle & Trigonometry

For Teachers 9th - 12th
Pupils are introduced to the topic of congruence and proportions in Geometry. Using technology, they construct and validate the properties of various geometric figures and identify whether it is congruent or proportion to the objects...
Lesson Plan
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Pape's Theorems

For Teachers 11th - Higher Ed
In this math worksheet, students find the length of the side of a regular hexagon whose area is numerically equal to its perimeter.
Lesson Plan
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Identifying Faces, Edges, and Vertices

For Teachers 4th
Fourth graders examine faces, edges, and vertices. In this geometry lesson, 4th graders participate in classroom activities that require them to compare geometric shapes, figures, and models.
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Perimeter

For Teachers 5th
Fifth graders create math word problems. In this geometry lesson plan, 5th graders define perimeter and discover how to find the perimeter of a rectangle, a square and a regular polygon. Students write word problems on finding the...
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Why use the Pythagorean Theorem?

For Teachers 8th
Eighth graders explore the Pythagorean Theorem.  In this middle school geometry lesson, 8th graders solve problems using the Pythagorean Theorem as they explore the definition of a theorem and attempt to determine the formula for...
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Speedy Area

For Teachers 8th - 10th
Learners calculate the speed, rate and distance. In this geometry lesson plan, students calculate the area and perimeter of polygons. They perform an activity with a CEENBoT and calculate the distance and speed.
Lesson Plan
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Graphing Coordinates

For Teachers 6th
Sixth graders practice graphing coordinates. In this geometry instructional activity, they use the x and y axis to locate points that must be connected in the right sequence to form a straight line.
Lesson Plan
West Contra Costa Unified School District

Arcs and Angles

For Teachers 9th - 12th
Noah didn't construct this kind of arc. High school scholars first explore how angles can be formed in circles. They then learn relationships between angles and arcs by conducting an exploratory activity where they position and draw arcs...
Lesson Plan
West Contra Costa Unified School District

Pythagorean Theorem and Its Converse

For Teachers 9th - 12th Standards
Challenge scholars to prove the Pythagorean Theorem geometrically by using a cut-and-paste activity. They then must solve for the missing sides of right triangles.

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