Curated OER
The Isosceles Triangle Problem
In this geometry instructional activity, 10th graders solve a problem involving an isosceles triangle. The problem appears to be deceptively easy, but instead requires the use of trigonometry to arrive at a correct solution. ...
Curated OER
Area and Perimeter
In this geometry activity, 10th graders use single variable equations to solve problems focusing on area and perimeter of triangles, trapezoids, parallelograms, rectangles, and hexagons. The one page activity contains seventeen...
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Geometry Problem
In this geometry worksheet, 10th graders analyze an equilateral triangle which is divided into right triangles and determine missing lengths. The one page worksheet contains one problem. Answer is provided.
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Triangles
In 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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Math Club Warm Up #17b
In this area worksheet, 6th graders solve 2 problems about area, one with a square and one with a triangle; there are 4 sheets on a page.
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Area and Periemeter
In this geometry worksheet, 10th graders determine the area and perimeters of various quadrilaterals and triangles. The one page worksheet contains ten problems. Answers are not provided.
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Angles and Triangles
Eighth graders examine Jewish symbols. In this Holocaust lesson, 8th graders discuss the meanings behind the Swastika and the Star of David. Students also measure the angles and shapes with the symbols.
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Identify triangles
Students explore triangles. In this geometry lesson, students will create note cards with pictorial depictions of right, acute,obtuse, scalene, isosceles, equilateral and equiangular triangles. Students will verbally describe each type...
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SAT Grid Practice Test 11
In this SAT practice test, students compute the area and perimeter of polygons. They determine the volume of a cylinder and solve problems with exponents. This one-page worksheet contains 10 problems. Answers are provided.
National Council of Teachers of Mathematics
How Many Triangles?
For this triangles worksheet, learners problem solve and shade triangles within other triangles. Students complete two problems.
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Tangrams
In this tangram worksheet, students 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 tangram...
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Find the Missing Side of the Right Triangle
In this find the missing side of the right triangle worksheet, middle schoolers use the Pythagorean theorem to find the missing side, given the other 2 lengths, for 4 triangles.
Curated OER
The Law of Cosines
In this Law of Cosines activity, 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 worksheet, students answer 10 problems finding the missing side of a right triangle using the Pythagorean theorem.
Curated OER
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...
Curated OER
Using Algebraic Equations in Geometry Problems
In this using algebraic equations in geometry problems learning exercise, 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 worksheet, 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
In this Pythagorean theorem worksheet, students 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.
Curated OER
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.
Curated OER
Using the Pythagorean Theorem
In this using the Pythagorean Theorem worksheet, students use the Pythagorean Theorem to find the missing information for ten right triangles.
Curated OER
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...