Worksheet
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Midpoint Formula Worksheet

For Students 10th
In this geometry worksheet students use the midpoint formula to determine the midpoint of a line segment given the end points.  The one page worksheet contains eight problems.  Answers provided. 
Worksheet
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Midpoint Formula Worksheet

For Students 10th
In this geometry worksheet, 10th graders use the midpoint formula to calculate the midpoint of a line segment given a pair of coordinates. There are 8 questions with an answer key.
Lesson Plan
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Perfectly Puzzling Pentominoes

For Teachers 2nd
Second graders utilize manipulatives (pentominoes) to demonstrate knowledge of: lines of symmetry, slides, reflections (flips), rotations (turns), area, and perimeter. This lesson gives students a meaningful way to practice these...
Lesson Plan
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Traveling aroud Our Town

For Teachers 1st - 2nd
Students are asked to describe to a partner how he or she walks to school or the bus stop. They are shown on the overhead an one-inch grid paper, and at the intersection of two lines on the grid paper, students are shown a house and...
Lesson Plan
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Trajectory Perplexity

For Teachers 11th - 12th
Students investigate measuring angles correctly through projectiles. In this geometry lesson, students launch a projectile to investigate the importance of how to measure an angle correctly and to explore trajectory. They collect...
Lesson Plan
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Lesson 10: Graphs

For Teachers 10th - 11th
Students explore graph theory.  In this geometry lesson,  graphs are used to solve problems in a variety of domains.  In this lesson the term graph refers to a collection of vertices and edges used to depict...
Lesson Plan
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Shape Collage Pizza

For Teachers K
Students identify shapes. For this geometry lesson, students cut out various shapes and create a "Shape Collage Pizza." Students glue their shapes onto a pizza template.
Lesson Plan
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Pascal's Triangle

For Teachers 10th
In this geometry lesson, 10th graders investigate Pascal's Triangles as they relate it to probability problems and geometric problems. They review the theories behind the formulas.
Lesson Plan
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The Very Hungry Caterpillar - Teaching Shapes

For Teachers 1st - 2nd
Students identify two- and three-dimensional figures and associate them with real-world objects.  In this geometry lesson, students are read The Very Hungry Caterpillar by Eric Carle and complete several activities including a chart...
Lesson Plan
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The Ice Cream Stands Problem

For Teachers 10th
Tenth graders pretend to set up an ice cream shop in a make believe town of shapes.  In this geometry lesson, 10th graders work together to put up an ice cream stand in an ideal location and solve for the minimum given the...
Lesson Plan
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Proving the Pythagorean Theorem

For Teachers 9th - 11th
Young scholars solve problems using the pythagorean Theorem. In this geometry lesson, students complete proofs using the Pythagorean Theorem. They share their proofs and solutions with their classmates and family members.
Worksheet
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The Pythagorean Theorem

For Students 10th
In this geometry worksheet, 10th graders use the Pythagorean Theorem to determine the length of the third side of a right triangle given the length of any two sides.  The three page worksheet contains a combination of seventeen...
Worksheet
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Pairs of Angles

For Students 10th
In this geometry worksheet, 10th graders determine the measures of various angle pairs:  supplementary, complementary, and vertical angles.  The two page worksheet contains a combination of twelve multiple choice and free...
Worksheet
Curated OER

Chords of Circle

For Students 10th
In this geometry activity, 10th graders solve problems using parallel chords, perpendicular bisectors and chords that are equal distance from the center.
Interactive
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SAT Grid Ins Practice Test 05

For Students 12th
In this SAT practice test instructional activity, 12th graders answer 10 short answer questions. Questions are from a variety of topics, but mainly ask about geometry concepts. The test is self-scoring.
Lesson Plan
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Special Triangles and Circles

For Teachers 9th - 11th
Students investigate special triangles and circles. In this geometry lesson, students construct a perpendicular bisector and discuss angles of a triangle. They find the angle bisectors, vetex and the types of circle constructed.
Lesson Plan
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Everyday Objects with Shapes

For Teachers Pre-K - K
Students explore geometric shapes.  In this geometry and language development lesson, students take a walk and look for shapes in the objects outdoors.  Students match each of four individual  paper shapes they are...
Lesson Plan
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Exploring Angle Pair Relationships

For Teachers 9th - 11th
Learners investigate the relationship between angles of triangles. In this geometry lesson, students identify properties of right and non-right triangles. They differentiate between vertical and supplementary angles.
Lesson Plan
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Exploring Angle/Pair Relationships

For Teachers 7th - 10th
Students find missing angles and sides of triangles. In this geometry lesson, students create intersecting lines to measure angles. They use Cabri Software to create virtual angles.
Lesson Plan
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Corresponding Sides and Angles of Similar Triangles

For Teachers 9th - 10th
Young scholars differentiate between corresponding sides ad angles of two triangles. In this geometry lesson, students identify the differences as well as the similarities between two triangles. They differentiate between similar and...
Lesson Plan
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Side Splitter Triangles

For Teachers 8th - 11th
Students investigate the side splitter theorem. For this geometry lesson, students estimate and solve problems dealing with ratios and proportions. They identify angles created by lines that are parallel.
Lesson Plan
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Finding the Area of a Parallelogram with Translations

For Teachers 8th - 10th
Students calculate the area of a parallelogram. In this geometry lesson, students perform translation using a coordinate plane and coordinate pairs. They perform translation on other polygons.
Lesson Plan
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Finding the Area of a Parallelogram with Translations

For Teachers 8th - 10th
Students calculate the area of parallelograms. In this geometry lesson, students identify properties of parallelograms and use to to solve problems. They create polygons using Cabri software.
Lesson Plan
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SAS Similarity Theorem

For Teachers 9th - 10th
Students identify and use the similarity theorem. In this geometry lesson, students differentiate between congruent and similar triangles. They solve problems using the computer modifying shapes by dragging.

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