Lesson Plan
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Measuring the Earth

For Teachers 10th - 11th
Students identify types of arcs and angles in a circle, find the measure of arcs and angles, and solve real world problems involving lengths of segments in circles, lengths, and areas.
Lesson Plan
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Watershed Investigations

For Teachers 9th - 12th
Students explore the components of a watershed and the factors that affect it. They read a topographical map and use geometry to determine the area of a watershed. Students estimate the volume of a body of water and perform runoff...
Worksheet
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Rectangular Prisms [G]

For Students 5th - 6th
In this rectangular prism worksheet, students find the volume and surface area of 3 rectangular prisms; answers are included on page 2.
Lesson Plan
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The Circle's Measure

For Teachers 3rd - 7th
Students explore circumference and diameter. In this math lesson, students apply their knowledge of circumference and diameter to solve mathematical riddles. Students apply this knowledge to find circumference and diameter of various...
Worksheet
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Quiz: Error in Measurement

For Students Higher Ed
In this measurement activity, students are presented with the measurements of two items. They compute the upper and lower limits of the range of tolerance for the measurements. Students find the absolute error and percent of error for...
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Similar Triangles

For Teachers 9th
Ninth graders find the height of every day objects using techniques learned through postulates that allow triangles in a problem to be similar. They calculate the length of a missing side and solve proportions.
Lesson Plan
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Getting Familiar with Fractals

For Teachers 9th - 12th
Students use the Internet to answer lab questions about fractals, and then construct fractals using the initial stage and iteration rule. They complete tables and generate rules for the "nth" term and create their own fractals.
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Visual Patterns in Tessellations

For Teachers 3rd - 12th
Students explore tessellations as well as various types of polygon. Students examine tessellating patterns in the world around them. Students examine tessellations by creating their own tessellations and completing the included worksheet.
Worksheet
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2 Digit Subtraction Worksheets with Regrouping

For Students 2nd - 3rd
In these subtraction worksheets, students will subtract single and double digit subtrahends from double digit minuends. Students will need to regroup to solve.
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Pape's Theorems

For Teachers 11th - Higher Ed
In this math worksheet, young scholars find the length of the side of a regular hexagon whose area is numerically equal to its perimeter.
Lesson Plan
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Reflections

For Teachers 5th
Fifth graders create a reflection of a poygon using a Mira. They discover that a line connecting a vertiex of a polygon and the corresponding vertex of its reflection is perpendicular to the line of reflection. Students create a glide...
Lesson Plan
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Nature's Polyhedrons

For Teachers 9th - 12th
Students are introduced to polyhedrons through using straw models to explore geometric solids and constructing Christmas tree ornaments using Epsom salt crystals. Students will view interactive videos and investigate and retrieve...
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The Strongest Shape

For Teachers K - 3rd
Students work collaboratively to design and construct a roof out of Legos for a house that was built in a previous lesson plan. The roof must be structurally sound and pass certain criteria determined by the teacher.
Lesson Plan
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Measurements

For Teachers 7th
Seventh graders solve word problems involving real world situation. In this geometry lesson plan, 7th graders solve problems related to volume. They apply the formulas taught in geometry.
Lesson Plan
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Measuring Supporting Structures

For Teachers 9th - 12th
Students calculate the volume of the Pantheon's columns and estimate changes in weight given different parameters.
Lesson Plan
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Boat Design

For Teachers 8th - 10th
Students build a boat and make predictions. In this geometry lesson plan, students design a cargo boat. They must show that the boat they designed can carry the cargo.
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What's Your Line?

For Teachers 5th
Fifth graders collect temperature readings over a period of time, enter the information into a spreadsheet and choose the appropriate graph to display the results.
Worksheet
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Twelve Related Rates Word Problems

For Students 12th - Higher Ed
In this word problems worksheet, students solve twelve related rates word problems. Knowledge of geometry is necessary to complete these problems.
Lesson Plan
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Lesson Exchange: Polygons (Middle, Mathematics)

For Teachers 6th - 7th
Students discover the relationship between the sides of a polygon and the number of diagonals that can be drawn from one vertex, the number of triangles that those diagonals form, and the sum of the interior angles of that polygon.
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Fly, Fly Away

For Teachers 9th - 12th
High schoolers use materials from their own environment to design a kite. In this kite design activity, students research the history of kites and obtain a formal mathematical definition of a kite. High schoolers sketch kite designs...
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Angles Lesson Plan

For Teachers 3rd - 5th
Students stud angles, and then play the "What's Your Angle?" game. They complete at least 10 computer generated problems from the Angles Applet.
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Cracks on the Walls

For Teachers 9th - 12th
Students observe the cracks in school walls and pavements. In this geometry instructional activity, students explore the factors to be considered before building a structure. They complete a graphing and calculation...
Lesson Plan
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Measuring Angles

For Teachers 3rd
Third graders describe an amount of turn from a particular position to another using the 'circular' benchmarks of 0, ++, ++, ++, and full turn. Estimation language such as 'just about', 'between', 'not quite', 'just over', and similar...
Lesson Plan
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Congruent Triangles - Is This Enough Information?

For Teachers 7th
Seventh graders examine congruence postulates and apply knowledge to triangles in the world around them.