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Measurement

For Teachers 7th
Seventh graders measure surface area. In this geometry lesson plan, 7th graders find the surface area of various geometrical shapes. Using a computer program, students compute the area of 2-D and 3-D shapes.  Students use graph paper to...
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Lesson Plan
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Perimeter

For Teachers 5th
Fifth graders create math word problems. In this geometry instructional activity, 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...
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Lesson Plan
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Distance and Functions

For Teachers 9th - 10th
Students calculate the distance using the distance formula. In this geometry instructional activity, students identify the distance a taxi cab travels. They relate distance to functions and relate it to the real world.
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Lesson Plan
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Strongest Polygon

For Teachers 9th - 12th
Learners define and identify shapes by name. In this geometry lesson plan, students construct, identify and compare polygons based on the number of sides. They classify each shape based on their angle sum theorem.
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Lesson Plan
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Fractal Fern

For Teachers 8th - 10th
Students identify the location of coordinate pairs of an image. In this geometry instructional activity, students perform transformation and identify the image and pre-image point of location. They apply the concept of fractals to...
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Lesson Plan
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Obtuse Triangles

For Teachers 4th
Fourth graders explore obtuse triangles. In this geometry lesson, 4th graders make obtuse triangles with paper and scissors. They determine how to find the center of their triangle.
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Lesson Plan
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Ara of Circles

For Teachers 8th - 10th
Students identify the differentiate the different properties of circles and parallelograms. In this geometry lesson, students calculate the area of each solid and identify the formula. They relate Pi to the circumference of a circle.
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Lesson Plan
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Congruence with Robot Gobot

For Teachers 8th - 10th
Students identify the properties of solids and polygons. In this geometry lesson, students identify the different measurements of a triangle. They use congruence parts and theorem to prove their answer.
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Lesson Plan
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Angle Action 1,2 and 3

For Teachers 8th - 10th
Students investigate angles through construction. In this geometry lesson, students use a protractor to identify the measurement of an angle. They identify angles cut by a transversal and two parallel lines.
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Lesson Plan
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Area Of Sectors

For Teachers 9th - 12th
Student find the area of a sector of a circle. In this geometry lesson, students  define the sector of a circle using a sketch. They find and identify examples of sector in the real world.
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Lesson Plan
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Pyramids- Slant Height and Altitude

For Teachers 8th - 10th
Students calculate the height and altitude of a pyramid. In this geometry lesson, students define the parts that make up a pyramid. They use the Pythagorean Theorem to find the missing parts of a pyramid.
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Lesson Plan
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Radius, Diameter and Area

For Teachers 8th - 9th
Students identify the radius and diameter of a circle. In this geometry lesson, students calculate the volume and area of a cylinder and circle. They relate the circumference of a circle to Pi.
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Lesson Plan
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"Geotown" Scrapbook

For Teachers 3rd - 5th
Students create a scrapbook. In this geometry lesson, students use digital cameras to take pictures of geometrical concepts. Students use the pictures to create a "Geotown" scrapbook.
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Lesson Plan
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Quadrilateral Review

For Teachers 8th - 10th
Students identify the properties of quadrilaterals. In this geometry lesson, students investigate the history of quadrilaterals and different types of quadrilaterals. They identify the length and mid-segment of each shape.
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Lesson Plan
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Similar Triangles - Applied Problems

For Teachers 9th - 12th
Students differentiate between similar and congruent triangles. In this geometry lesson, students identify the angles of triangles using the similarity theorem. They apply concepts of triangles to the real world.
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Lesson Plan
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Crop Circles

For Teachers 5th - 8th
Students calculate the area and circumference of a circle. In this geometry lesson, students solve word problems with circles and create formulas to calculate the area. They find the rate and complex area of a circle.
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Lesson Plan
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Calculating Distances in Two and Three Dimensions

For Teachers 9th - 11th
Students use the Pythagorean Theorem to solve problems. In this geometry lesson, students solve for the distances by calculating the different parts of the shape of a two and three dimensional shape. They reason by analogy.
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Unit Circle and Triangle

For Teachers 9th - 11th
Students apply the Unit Circle to solve ratios of triangles. In this geometry lesson, students derive the different ratios of a triangle using the Pythagorean Theorem. They find the angles of a unit circle using a right triangle.
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Graphing Coordinates

For Teachers 6th
Sixth graders practice graphing coordinates. For this geometry lesson, they use the x and y axis to locate points that must be connected in the right sequence to form a straight line.
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Using Geometric Shapes in Architecture

For Teachers 3rd
Third graders identify two and three dimensional shapes used in architectural designs by viewing images on the Internet.  In this geometry lesson plan, 3rd graders create their own building designs and identify the geometric shapes that...
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Congruent and Similar figures

For Teachers 8th
Eighth graders explore congruent and similar figures.  For this eighth grade geometry lesson, 8th graders use geoboards to create congruent and similar figures and explore the relationships between the sides and angles. 
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Surface Area of Cubes and Rectangular Prisms

For Teachers 8th
Eighth graders calculate surface area of 3-D shapes. In this geometry lesson plan, 8th graders analyze cubes and prisms by finding their area and surface area. They compare the data of these two shapes.
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Lesson Plan
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How are Trig Ratios Used to Measure Triangle Sides

For Teachers 8th - 11th
Students identify the ratios of trig identities. In this geometry lesson, students solve the missing sides and angles of triangles using trig ratios. They relate the graphs and waves to real life scenarios.
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Lesson Plan
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The Search for Pythagoras' Treasure

For Teachers 8th - 10th
Students identify and define properties of triangles. In this geometry lesson plan, students identify the missing sides and angles of right triangles. They use the rules of the Pythagorean Theorem to solve their problems.

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