National Council of Teachers of Mathematics
How Many Triangles?
For this triangles worksheet, learners problem solve and shade triangles within other triangles. Learners complete two problems.
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Tangrams
In this tangram worksheet, middle schoolers form a square using tangrams. Afterwards, they form additional shapes with tangrams. This one-page worksheet contains 180 tangram shapes for students to create by placing...
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Find the Missing Side of the Right Triangle
In this find the missing side of the right triangle worksheet, students use the Pythagorean theorem to find the missing side, given the other 2 lengths, for 4 triangles.
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The Law of Cosines
For this Law of Cosines worksheet, students are asked to demonstrate the ability to apply the Trigonometric Law of Cosines and the Inverse Law of Cosines to solve for sides and angles of right triangles.
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Pascal's Patterned Triangle
Fifth graders receive a brief history of Pascal's triangle. As a class the students construct the first few rows of the triangle. The students are then split into groups where they finish a worksheet identifying the total value of each...
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The Greedy Triangle
Students discuss figures with various numbers of sides. In this geometry lesson, students are read The Greedy Triangle by Marilyn Burns, they participate in a class discussion of many sided figures and are introduced to the term...
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Pythagorean Theorem for Algebra I
In this Pythagorean theorem for algebra I instructional activity, learners answer 10 problems finding the missing side of a right triangle using the Pythagorean theorem.
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Drawing a Triangle with Cabri Junior
Learners draw triangles on their graphing calculators using the Cabri Junior application. In this graphing calculator lesson, students follow step by step directions to create triangles on their calculator. They identify the type of...
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Using Algebraic Equations in Geometry Problems
In this using algebraic equations in geometry problems worksheet, 6th graders write an equation to solve each addition problem about geometry, then find the solution.
Print and Practice
Triangles and Rectangles
In this triangle and rectangle activity, students color triangles red and rectangles blue in a given set of shapes. A reference web site is given for additional activities.
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Pythagorean Theorem
For this Pythagorean theorem worksheet, learners use the Pythagorean theorem to find the missing side of the triangle. Students complete 10 problems.
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Inverse Functions in Trigonometry
In this inverse functions in trigonometry activity, students find the missing angles in eight right triangles, given the length of two sides.
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Triangle: Print and Color
In this word recognition learning exercise, students trace the word "triangle", write the word independently, and color the picture of the triangle.
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Using the Pythagorean Theorem
In this using the Pythagorean Theorem instructional activity, students use the Pythagorean Theorem to find the missing information for ten right triangles.
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Formula Determination
Students derive a formula for the interior degrees in any convex polygon. In this geometric figure lesson, students determine the shapes of various polygons and the number of triangles formed. They use this information to derive the...
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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 instructional activity, 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, learners use the trigonometry equation to find the sine of triangles. Students solve the sine for 10 triangle problems.
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Triangle Puzzle
For 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 activity, 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.