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Activity
Illustrative Mathematics

Global Positioning System II

For Teachers 9th - 12th Standards
Intricate details of a modern technology that many of us take for granted in our phones, computers (and some cars) are laid bare in a short but deeply investigative activity. The math behind a seemingly simple GPS device...
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Lesson Plan
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Properties of Special Quadrilaterals

For Teachers 9th - 12th Standards
Teach your mathematicians how to identify the properties of quadrilaterals. In this geometry lesson, high schoolers solve for missing angles and sides of a special quadrilateral. They use the TI to move the sides around and create...
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Lesson Plan
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Geometry Regents Questions: Isosceles Triangle Theorem

For Teachers 9th - 12th
In this isosceles triangle worksheet, students solve 19 multiple choice and short answer problems.  Students use the isosceles triangle theorem to determine unknown angle measures.
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Lesson Plan
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Quadrilaterals

For Teachers 3rd - 6th
Students construct a variety of four-sided figures using a K'NEX Geometry Set. They view and discuss pictures of shapes, then in small groups they construct as many four-sided shapes as possible using the K'NEX Rods and Connectors. As a...
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Lesson Planet Article
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Using Optical Illusion Brain Teasers Add a Twist to Math and Science

For Teachers 6th - 8th
Optical illusion activities can provide a motivating way for students to explore math and science concepts.
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Interactive
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My Test Book: Geometry

For Students 3rd - 4th
In this online interactive math skills worksheet, students solve 10 multiple choice math problems regarding geometry skills. Students may view the correct answers.
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Interactive
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My Test Book: Geometry

For Students 6th - 8th
In this online interactive math skills worksheet, students solve 10 multiple choice math problems regarding geometry skills. Students may submit their answers to be scored.
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Worksheet
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4th Grade Math Geometry Practice

For Teachers 4th - 5th
For this 4th grade geometry worksheet, students complete a set of 20 questions related to grade 4 geometry concepts. An answer key is included. 
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Interactive
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My Test Book: Geometry skills

For Students 3rd - 4th
In this online interactive math skills worksheet, students solve 10 multiple choice math problems regarding geometry skills. Students may view the correct answers.
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Lesson Plan
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Geometry Institute Lesson

For Teachers 6th - 8th
Students practice geometry skills. In this geometry lesson, students find the surface area of cubes and prisms, identify shapes on solids, and distinguish between 2-dimensional objects and solids.
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Worksheet
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Geometry Review

For Students 10th
For this geometry worksheet, 10th graders examine and evaluate their understanding of many of the basic concepts of geometry. The six page worksheet contains thirty-five questions. Answers are not provided. 
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Worksheet
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Second Grade Geometry

For Students 2nd
In this second grade geometry worksheet, 2nd graders answer 10 multiple choice questions about geometric shapes, with the answers available online.
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Interactive
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Geometry

For Students 9th - 10th
In this geometry worksheet, students identify the different shapes created by nets. They also identify the intersection of lines and planes. There are 5 questions with an answer key.
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Worksheet
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Geometry

For Students 1st - 3rd
In this open and closed curves geometry worksheet, students distinguish between the 2 types of curves as they solve 6 problems
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Worksheet
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Geometry Characteristics

For Students 3rd - 5th
In this geometry worksheet, students select characteristics from a word bank that make sets of shapes fall into the same category. A reference web site for additional activities is given.
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Worksheet
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Geometry-Symmetry

For Students 2nd - 4th
For this geometry-symmetry worksheet, students determine which shapes in sets are symmetrical/not symmetrical. A reference website is given for additional resources.
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Worksheet
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Proofs in Coordinate Geometry

For Students 10th - 11th
In this coordinate geometry worksheet, students identify the lengths of a quadrilateral and find the slope of a line. They use proofs to identify the characteristics of given quadrilaterals. This one-page worksheet contains ten problems.
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Worksheet
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Properties of Geometry

For Students 10th
In this properties of geometry activity, 10th graders solve and complete 12 different problems that include various theorems. First, they draw a figure that illustrates the SAS inequality property. Then, students prove that two line...
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Worksheet
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Geometry Proofs

For Students 10th
In this geometry proofs worksheet, 10th graders solve and complete 6 different problems that include various proofs. First, they prove a triangle has equivalent angles as given. Then, students prove two angles supplementary as described.
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Worksheet
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Chapter 4.5 Geometry Practice Problems

For Students 10th - 11th
In this geometry practice problems worksheet, students write geometric proofs to prove the validity of given circumstances. Students prove parallel lines, perpendicular lines, and similar angles. This four-page worksheet contains eight...
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Worksheet
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Proofs Chapter 2: Geometry

For Students 10th - 11th
In this geometry activity, students look at given pictures and prove congruent lines and angles. This three-page activity contains nine multi-step problems.
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Lesson Plan
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Geometry

For Teachers 1st - 2nd
In this geometry practice worksheet, students read the hints regarding hexagons, pentagons, and octagons. Students then examine 3 groups of shapes and identify them as hexagons, pentagons, or octagons.
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Lesson Plan
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Geometry: Identify Shapes

For Teachers 2nd - 3rd
In this geometry worksheet, learners identify a set of 6 shapes, shown in a 2 column graphic organizer; students write the name of the shape in the left column, 6 shapes total.
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Worksheet
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Geometry - Congruent Figures

For Students 1st - 3rd
In this geometry activity, students read the definition of congruent figures. They match the figures shown at the top of the page with the one that is congruent in a box at the bottom of the page.

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