Lesson Plan
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Creating Perpendicular Bisectors

For Teachers 9th - 10th
Students create perpendicular bisectors. In this geometry activity,students use a straight edge and protractor to create a perpendicular bisector. They graph line on the TI and analyze it.
Lesson Plan
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CSI Investigation of Congruence and Similarity

For Teachers 9th - 12th
Students differentiate between similarity and congruence using polygons. In this geometry lesson, students label triangles based on their properties. They find missing sides and angles using the interior sum theorem.
Lesson Plan
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A Perpendicular Pilgrimage

For Teachers 9th
Ninth graders design a safe passage through a 2-D obstacle. In this geometric math lesson, 9th graders engage in a hands on activity to better understand the concept of geometric and algebraic perpendicularity. Students will work in...
Lesson Plan
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Simple Measurements

For Teachers 8th - Higher Ed
Students determine the height of objects using shadows. In this math activity, students discus methods of finding the height of items without directly measuring. Students measure shadows and figure the actual height of the object.
Worksheet
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Angle Measurement Exercises

For Students 11th - Higher Ed
In this math worksheet, students find the measurements of the angles in degrees. Then they determine which ones are in Standard Position.
Lesson Plan
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Similarity and Congruence

For Teachers 9th - 12th
Students explore the concept of similarity and congruence. For this similarity and congruence lesson, students identify and verify whether or not two figures are similar, congruent, or neither. Students use postulates and theorems such...
Lesson Plan
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Similarity and Congruence

For Teachers 9th - 12th
High schoolers explore the concept of similarity and congruence. In this similarity and congruence lesson, students cut out strips of paper and form a triangle. High schoolers try to prove that their triangles are congruent using the SSS...
Lesson Plan
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CSI Investigation

For Teachers 8th - 10th
Learners solve real life situation using the Pythagorean Theorem. In this geometry lesson, students calculate the length, midpoint and slope of segments. They solve word problems using properties of square roots.
Lesson Plan
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Are you in Golden Shape

For Teachers 7th - 10th
Students solve and verify the solution for unknown measures. In this geometry lesson, students identify the properties of circles. They use the arc, angle and segment relationship to find the missing measures.
Lesson Plan
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Distance Formula

For Teachers 9th - 10th
Students create ways to find the number of square miles that lie in a triangle having vertices at A, B, and C. They compute the distance between two points and use Heron's formula to find the area of the triangle. Finally, students...
Worksheet
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Multiple Images Activity

For Students 5th - 8th
In this images worksheet, students use different sized mirrors to determine how many angles and images are reflected. Students complete 5 sets of directions.
Lesson Plan
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Proportional Segments Between Parallel Lines

For Teachers 9th - 12th
Young scholars identify similar triangles.  In this proportional segments lesson, students identify corresponding sides, set up ratios, and find the length of the missing side of a triangle.  They use the...
Lesson Plan
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Tangent Properties

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

For Teachers 9th - 12th
Students explore the concept of transformations. In this transformations lesson, students use Geometer's Sketchpad to construct cyclic and dihedral figures. Students study reflection and rotation symmetry. Students discuss vertical,...
Lesson Plan
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Shapes in Motion

For Teachers 6th - 8th
Students practice moving different shaped objects through a series of transformations. In groups, they discuss other ways to manipulate the figure to achieve the same results. They solve multiple story problems in the same manner.
Lesson Plan
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Perfection on Ice!: Math, Geometry, Fibonacci Numbers, Olympics

For Teachers 5th - 7th
Students use the human body as a foundation for gaining practice in measuring angles and calculating ratios and proportions.
Worksheet
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Measuring Angles

For Students 5th - 6th
In this measuring angles worksheet, students solve 10 problems in which angles are measured with a protractor and labeled with: acute, obtuse, right.
Lesson Plan
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Geometry for the Technologies

For Teachers 9th - 12th
Students discover how to use various tools to measure and draw angles. With protractors, they classify angles according to angle measure, identify vertical angles, and perform angle additions. For their final project, students create...
Worksheet
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Measuring Angles

For Students 5th - 6th
In this angles worksheet, students use a protractor and measure a set of angles, correctly checking features and measurements that apply. A reference web site is given for additional activities.
Lesson Planet Article
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Measuring Angles

For Teachers 3rd - 5th
Identifying and measuring angles with a protractor can provide a fun way for students to learn this mathematical concept.
Interactive
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Measuring Angles - Pretest Questions

For Students 4th - 6th
Upper graders solve ten multiple choice problems about angles and measuring angles.
Worksheet
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Construct, Bisect, Duplicate: Geometry Practice with Compass and Straight Edge

For Students 9th - 12th
Geometers employ a straight edge and compass to duplicate and bisect segments and angles, construct perpendiculars, parallel lines, figures, and circles with points of concurrency. Ample practice with 65 questions across 8 worksheets. No...
Assessment
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Conversion Graphs

For Students 7th - 9th Standards
After watching a video on conversions, learners convert meters to feet, dollars to pounds, pounds to Euros, gallons to liters, and kilometers to miles. Then, they graph the conversion changes onto graph templates.
Assessment
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Tallys and Charts

For Students 4th - 6th Standards
After watching a brief instructional video, young mathematicians are put to the test. By completing and reading frequency tables, tally charts, and bar graphs, individuals show their understanding of how to interpret data.