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Lesson Plan
Curated OER

Identifying Triangles

For Teachers 6th
Sixth graders identify and define a variety of triangles. In this identification of triangles lesson, 6th graders draw examples of each triangle on a whiteboard, then complete a worksheet.
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Lesson Plan
Curated OER

Geometry of Triangles - Week 6

For Teachers 12th - Higher Ed
In this geometry of triangles worksheet, students find the length of sides, are, and angle measurement of inscribed triangles, pentagons, and midpoint of a line. This two-page worksheet contains seven problems.
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Worksheet
Curated OER

Easy Worksheet: Types of Triangles

For Students 9th - 12th
In this types of triangles worksheet, high schoolers solve 6 short answer problems. Students identify the type of triangle being described according to side length or angle measure.
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Worksheet
Curated OER

Leveled Problem Solving Triangles

For Students 4th - 6th
For this triangles practice worksheet, learners sharpen their problem solving skills as they solve 6 story problems.
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Lesson Plan
Curated OER

Angles And Triangles

For Teachers 7th
Seventh graders participate in a lesson that is focused upon the concepts of classifying different angles and triangles. They practice classifying triangles according to its kind that includes types of angles, congruence, and vertices....
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Worksheet
Curated OER

Triangle Exercises

For Students 6th - 8th
In this math worksheet, students determine the name for each triangle according to its classification. Then they create a truss construction model.
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Worksheet
Curated OER

Triangles Word Search

For Students 5th - 6th
In this word search worksheet, learners locate 7 types of triangles. Triangles include isosceles, acute, equilateral, right, and obtuse.
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Lesson Plan
Curated OER

Review of Triangles

For Teachers 8th - 10th
Students investigate the Pythagorean Theorem. In this geometry instructional activity, students define angles and sides of right triangles. They calculate the area and surface area using formulas derived by the Pythagorean Theorem.
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Lesson Plan
Curated OER

Twenty-Five Measures of the Angles of a Triangle Problems

For Teachers 9th - 10th
For this triangle worksheet, students calculate the measures of the angles or the sums of the measures of the angles in twenty-five triangle problems and hands-on activities.  The solutions are provided.
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Lesson Plan
Curated OER

Triangle Classification

For Teachers 9th - 12th
Students classify different types of triangles. In this geometry instructional activity, students identify and use properties of triangles. They differentiate between isosceles and equilateral triangles.
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Lesson Plan
Curated OER

Angles in Triangles

For Teachers 8th
Eighth graders translate word problems using mathematical ideas. In this geometry lesson, 8th graders identify angles of triangles using equations and the triangle sum theorem. They create angles with a protractor and straight edge.
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Worksheet
Curated OER

Pythagorean Theorem

For Students 9th
In this Pythagorean theorem worksheet, 9th graders solve and complete 6 various types of problems. First, they find the length of a right-angled triangle's hypotenuse. Then, students determine which triangle is described and explain...
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Lesson Plan
Curated OER

Shape Up

For Teachers 6th - 8th
Students explore differents types of triangles and quadriaterals. In this polygon lesson, students  model identify and compare two and three dimensional geometric figures. Students create tangrams and discover the difference between...
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Worksheet
Curated OER

Triangle Angle Sort

For Students 10th
In this triangle and angle worksheet, 10th graders identify 36 different angles and triangles illustrated on the sheet. First, they define the vocabulary to include equilateral, scalene, right, and isosceles triangle. In addition, they...
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Unit Plan
PBS

Accessible Shapes

For Teachers 6th - 8th Standards
All the 2-D and 3-D measurement work you need is in one location. Divided into three sections, the geometry lesson plans consist of visualization of three dimensions, classifying geometric figures, and finding surface area and volume....
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Printables
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Houghton Mifflin Harcourt

Unit 5 Math Vocabulary Cards (Grade 6)

For Students 6th Standards
Acute angle, line of symmetry, and vertex are a few terms you'll find in a set of 90 flashcards designed to reinforce math vocabulary. Included in the set are two types of cards; a word card printed in bold font, and a definition card...
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Worksheet
Curated OER

Identify Triangles

For Students 5th - 6th
In this triangle worksheet, students identify triangles as either, right, acute, obtuse, equilateral, scalene or isosceles. A reference web site is given for additional activities.
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Worksheet
Curated OER

Identifying Triangles

For Students 4th - 6th
In this triangle activity, students label triangles as acute, right, obtuse, scalene, equilateral or isosceles. A reference web site is given for additional activities.
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Worksheet
Curated OER

Identify Triangles #

For Students 4th - 6th
In this triangle learning exercise, students identify triangles as scalene, equilateral, right, obtuse, acute or isosceles. A reference web site is given for additional activities.
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Lesson Plan
Curated OER

Triangle Side Lengths and Angles Measures

For Teachers 9th - 10th
Students identify missing sides and angles. In this geometry lesson, students use triangular theorems to identify the missing sides. They use the Pythagorean Theorem to find the different ratios of each side.
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Lesson Plan
Curated OER

Angle-Side Relationships

For Teachers 9th - 12th
Students calculate the different sides and angles of a triangle. In this geometry lesson, students use triangular properties to define the relationship between two triangle. They identify missing angles using the interior angle theorem.
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Worksheet
Curated OER

Identifying Types of Triangles

For Students 5th - 6th
In this triangle worksheet, students check the appropriate label for triangles: right, acute, obtuse, scalene, isosceles or equilateral. A reference web site is given for additional activities.
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Worksheet
Curated OER

Identify Triangles

For Students 4th - 6th
In this triangle worksheet, students check the correct answer, identifying triangles as either right, obtuse, acute, scalene, isosceles or equilateral. A reference web site is given for additional activities.
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Lesson Plan
Curated OER

Symmetry and Geometric Shapes on Campus

For Teachers 6th - 8th
Build on your learners' previous knowledge of geometric shapes and symmetrical figures. Then set them out to take photos of geometric shapes on campus. They assess whether the photos contain symmetry or not. 

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