Curated OER
Altitude Locator
Students use protractors, strings, and straws to construct a device used to determine the height of tall objects. In this applied geometry lesson, students use common objects to construct a tangent height guide. They use principles of...
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Cosine
In this cosine worksheet, students find the cosine of x for different measurements of triangles. Students complete 10 cosine problems.
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Sine
In this sine worksheet, students use the trigonometry equation to find the sine of triangles. Students solve the sine for 10 triangle problems.
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Triangle Puzzle
In this geometric shapes worksheet, students analyze an intricate design of lines. Students look for all the triangles and tell how many there are.
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Physics Lab Rockets
Students construct and test balloon rockets and a model rocket. In this rocket science lesson, students use an inquiry-based method to master balloon rockets and have a shoot-off with the goal of attaining the highest altitude. Next,...
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Roll It! Creating an Entrance Ramp
Students explore the concept of triangles. In this triangles lesson plan, students are to propose a plan for a ramp at their school. Students use the Pythagorean Theorem and trigonometry to determine the length, height, and...
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Identify Triangles 2
In thins triangles review worksheet, students examine 4 triangles and their measurements. Students classify them as equilateral, isosceles, or scalene.
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Identify Triangles
In thins triangles review worksheet, students examine 3 triangles and their measurements. Students classify them as acute, right, obtuse, equilateral, isosceles, or scalene.
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Drawing Triangles
In this drawing triangles worksheet, 6th graders read the dimensions of four triangles, given the length or the angle, identify the type of triangle and draw it.
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Using Centimeters to Measure the Perimeter of Triangles
In this using centimeters to measure the perimeter of triangles worksheet, 2nd graders measure 6 triangles with a centimeter ruler and write the equation used to find the perimeter.
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Find the 2D shape
In this 2D shapes worksheet, students find the rectangular prism, triangular prism, pentagon, and triangle. Students have 3 shapes to choose from in each of the 4 problems.
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Identify Triangles
In this triangles worksheet, students identify each triangle as either being equilateral, isosceles, or scalene. Students complete answers for 3 triangles.
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Geometric Shapes
In this geometric shapes worksheet, learners respond to 4 multiple choice questions that require them to identify triangles, squares, and rectangles.
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Geometry
In this geometry instructional activity, students determine what if 6 different shapes are a circle, square, triangle or a rectangle. Students bubble in their answers.
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Identifying Triangles
In this triangles practice worksheet, learners respond to 4 questions that require them to identify the pictured triangles as acute, right, obtuse, scalene, isosceles, or equilateral triangles.
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Find the unknown angle in the following triangles
In this unknown angle activity, students find the unknown angle in the triangle that gives them 2 angles. Students find 9 unknown angles.
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Identify Geometric Shapes
In this identify geometric shapes learning exercise, students identify eleven shapes as either triangles, nonagons or quadrilaterals.
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Identifying Triangles
In this triangles practice activity, students respond to 4 questions that require them to identify the pictured triangles as acute, right, or obtuse triangles.
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Identifying Shapes: Cubes, Triangles, Cones and Spheres
In this identifying shapes learning exercise, students tell which shapes in sets are named, choosing from cube, triangle, cone or sphere. A reference web site is given for additional activities.
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Triangle Worksheet: Cut, Construct and Think 1
In this triangle worksheet, 6th graders draw and cut out a triangle, cut it into three pieces, then arrange the pieces to make new shapes.
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Isosceles Triangles
In this isosceles triangles worksheet, students cut or count the triangles on this sheet. Students cut or count out 13 isosceles triangles that are all different colors.
Math Salamanders Ltd.
2D Shape Sheet Triangles
For this triangles worksheet, students can cut out or count the triangles given to them. Students cut or count 13 different colored triangles.
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Let's Explore the World of Triangles and Quadrilaterals!
Second graders explore the features of triangles and quadrilaterals. In this lesson on triangles and quadrilaterals, 2nd graders rotate with their group to five different activities all exploring a different aspect of geometry.
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Shape and Space: Circles
Middle schoolers create isosceles triangles. In this triangles lesson, students participate in a quick fire exercise with combinations of numbers totaling 180. Middle schoolers complete a worksheet with several problems.