Curated OER
Orthocenter Of a Triangle
Students find the orthocenter of a triangle. In this geometry lesson, students identify where the altitudes meet in a triangle. They use Cabri software to explore acute, obtuse and right triangles.
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Concurrent Lines in Triangles
Students explore the concept of concurrent lines in triangles. In this concurrent lines in triangles lesson, students work in groups to investigate properties of concurrent lines in acute, right, and obtuse triangles. Students use a...
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Concurrent Lines, Medians and Altitudes
In this geometry instructional activity, students construct angles and identify medians and altitudes. They use a compass and protractor to perform heir construction. There are 28 questions.
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Incenter of a Triangle
Tenth graders find the incenter of a triangle. In this geometry instructional activity, 10th graders define the way to create an incenter with an angle bisector. They differentiate between incenter and incircle.
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Analytic Geometry-Good Problems from Alex Pintilie
In this analytic geometry worksheet, students solve 12 word problems. Problems cover identifying the locus of an equation as well as the locus.
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Quadratic and Linear Functions
In this Algebra II learning exercise, 11th graders review and apply the basic concepts for solving linear and quadratic equation. The one page learning exercise contains twelve problems. Solutions are not provided.
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Properties of Quadrilaterals
In this properties of quadrilaterals worksheet, students use the properties of quadrilaterals to find the perimeter, angle measurement or length of a missing side of a given polygon. Examples and explanations of the properties are...
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Regents Exam Questions G.G.21: Centroid, Orthocenter, Incenter, and Circumcenter
In this triangles worksheet, students solve 4 multiple choice problems. Students find the centroid, orthocenter, incenter, and circumcenter or various triangles.
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Exercise 23--the Regular Pentagon on a Given Side
Middle schoolers examine and study how to recognize the characteristics of a regular pentagon and demonstrate how to construct one. They become aware of associating a regular pentagon to its term of a double map and practice the concept...
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Polygons All Around Us!
Students explore the concept of polygon properties. In this polygon properties lesson plan, students draw polygons with different numbers of sides such as pentagons, octagons, hexagons, etc. Students identify different geometric shapes...
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Quadrilateral Explorations
In this geometry activity, 9th graders classify quadrilaterals by using coordinate geometry and the properties of various quadrilaterals. The seven page activity contains eleven questions. Answers are not included.
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Diagonals of Quadrilaterals
Students find the diagonals of the quadrilaterals. For this geometry lesson, students identify and use properties of quadrilaterals. They define different parts of a quadrilateral shape.
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Diagonals to Quadrilaterals II
Students identify the properties of different polygons. In this geometry lesson, students find the slope of a line and calculate the distance between two lines. They differentiate between similar and congruent polygons.
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Geometry, Word Search Puzzle
In this math worksheet, students look for the words that are related to the math words used in the practice of geometry. They also practice spelling.
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