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Worksheet
Math Mammoth

Triangles 1

For Students 5th - 9th
In this triangles worksheet, students measure and calculate the measurements of eight triangles, their sums and classify the triangles as acute, obtuse or right.
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Worksheet
Curated OER

Hands On: Construct Triangles and Rectangles

For Students 4th - 7th
In this congruent triangles and rectangles worksheet, students solve 6 word problems where they identify whether triangles and rectangles are congruent, and construct triangles. Students must explain their reasoning and prove each answer.
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Worksheet
Curated OER

Triangles

For Students 6th - 10th
In this triangles worksheet, students solve six word problems where they determine the angles measures in different triangles.
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Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 6th - 7th
In this pythagorean theorem worksheet, students identify the missing length of one side for 10 triangles. Each triangle gives the lengths of two sides and students must find the length of the third. 
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Lesson Plan
Alabama Learning Exchange

Polygons-Changing Area Versus Changing Perimeter

For Teachers 5th - 8th Standards
Investigate the area and perimeter of polygons in this geometry lesson. Young geometers use grid paper to draw a quadrilateral and calculate its area and perimeter. They also read The Greedy Triangle to identify the changing shape of...
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Lesson Plan
Curated OER

Pythagorean Theorem Spreadsheet

For Teachers 6th - 8th
Studetns use a spreadsheet to organize data on the sides of a triangle. They use the Pythagorean Theorem and the If then spreadsheet function to decide whether the three sides determine a right triangle. Students work individual...
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Lesson Plan
Curated OER

The Greedy Triangle-Intro to Geometric Shapes

For Teachers 4th - 6th Standards
 In this geometry lesson plan, learners read The Greedy Triangle and use geoboards to construct geometric shapes. They identify the number of sides and angles each shape has.
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Worksheet
Curated OER

Angles Activities

For Students 5th - 8th
A series of geometry worksheets have mathematicians constructing, dissecting, overlapping, and measuring as they analyze angles in various contexts. Learners use symmetry and reflections in a compass rose to write instructions on...
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Lesson Plan
Curated OER

Applying the Pythagorean Theorem

For Teachers 6th - 8th
Learners use the Pythagorean Theorem to find the distances between two points. Use this Pythagorean Theorem lesson plan to have learners find the distances on a coordinate plane in small groups.
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Worksheet
Math Mammoth

Triangles

For Students 6th - 8th Standards
A six-page packet walks, or bends learners through angles that combine to create triangles. Definitions are given for right triangles, obtuse and acute triangles. They draw angles according to directions, using a protractor to meet the...
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Unit Plan
Virginia Department of Education

Classifying Angles

For Teachers 4th - 8th Standards
Don't be obtuse, this geometry unit is the just the right resource for educating the acute young minds in your class. From classifying and measuring angles, to determining the congruence of shapes, this resource covers a wide range of...
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Interactive
Curated OER

Pythagorean Theorem

For Students 6th - 10th
In this measurement worksheet, students will be given 2 sides of a right triangle, they will determine if the missing side is a leg or the hypotenuse. They will use the Pythagorean Theorem to create an equation and find the length of the...
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Worksheet
Curated OER

Constructing Triangles

For Students 5th - 6th
In this constructing triangles online worksheet, students construct thirteen triangles on paper first and then type in their answers on line. Students can check their answers as they go and the computer calculates the overall score for...
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Lesson Plan
Curated OER

Triangle Puzzler

For Teachers 5th - 8th
Students are introduced to some basic concepts of geometry. They explain that the definition of a triangle is a figure with three sides, three angles, and three points. Triangles can be named by using three points in their correct sequence.
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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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Worksheet
Curated OER

Triangles

For Students 6th - 10th
For this triangles worksheet, students solve for the missing angles and missing sides on the triangles given. Students complete 12 problems total.
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Lesson Plan
Curated OER

Constructions of Isosceles and Equilateral Triangles

For Teachers 4th - 9th
Students explore the difference between drawing and constructing a triangle utilizing The Geometer's Sketchpad on the computer. They create, develop and script constructions for both isosceles and equilateral triangles. Each student has...
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Worksheet
Curated OER

Family Activity: Triangles and Quadrilaterals

For Students 6th - 8th
In this triangles and quadrilaterals worksheet, students solve 7 short answer problems. Students find objects around the house that are constructed from triangles, parallelograms, trapezoids, squares, rectangles. Students sketch the...
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Printables
Pedago Net

Angles Fortune Teller

For Students 5th - 8th
Young mathematicians use this activity-based worksheet to practice identifying various angles and triangles. The outline of the sheet allows for easy folding and cutting. When completely folded, the picture flap should match up with the...
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Worksheet
Curated OER

Independent Practice 2: Triangles

For Students 6th - 8th
In this triangle worksheet, students identify given triangles according to their sides and angles. Afterward, students draw triangles to match given descriptions. This one-page worksheet contains 15 problems.
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Worksheet
Curated OER

Triangles Word Search

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

Hands On: Area of Triangles

For Students 5th - 7th
In this area of triangles practice worksheet, students sharpen their problem solving skills as they solve 6 story problems.
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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: Practice

For Students 4th - 6th
In this triangle worksheet, students classify triangles in 2 ways, write algebraic expressions to represent values then solve, and complete 1 test prep question. Houghton Mifflin text referenced.

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