Curated OER
Special Right Triangles
Students identify different types of special right triangles. In this geometry lesson, students differentiate between right triangles and isosceles triangles. they construct the triangles using geometry software and make conjectures...
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Exploring the Hinge Theorem
Learners explore the application of Hinge Theorem. In this geometry lesson, students write inequalities, given two sides of a triangle. They solve problems with triangular inequalities using the proper theorem.
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The Sierpinski Triangle
Students investigate the Sierpinski triangle. In this geometry lesson plan, students define fractal curves and its relationship to triangles. They identify repeating sequences and relate it to fractals.
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Median
Students solve problems involving triangles. In this geometry instructional activity, students use the properties of triangles to find the angles and side. They identify the median and altitude of the triangle.
Curated OER
Hospital Locator
Students apply properties of triangles to the real world. In this geometry lesson, students identify the median and angle bisectors of triangles. They plan the appropriate are to place a new medical center based on their knowledge of...
Curated OER
Lines In Geometry
Students define important vocabulary words using a dictionary. In this geometry lesson plan, students identify and use properties of triangles to solve problems. They identify the median. altitude and angles as well as properties of...
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Finding the Angle Measurements in Isosceles Triangles
In this angles worksheet, 9th graders find the angle measurements in four isosceles triangles. Two of these triangles are drawn inside a circle, where two of the sides of the triangles are formed by radii.
Curated OER
Identifying Triangles
Sixth graders identify and define a variety of triangles. In this identification of triangles instructional activity, 6th graders draw examples of each triangle on a whiteboard, then complete a worksheet.
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Area and Perimeter
In this geometry worksheet, 10th graders use single variable equations to solve problems focusing on area and perimeter of triangles, trapezoids, parallelograms, rectangles, and hexagons. The one page worksheet contains seventeen...
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Triangles
In this triangles activity, students solve for the missing angles and missing sides on the triangles given. Students complete 12 problems total.
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Area and Periemeter
For 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 instructional activity, 8th graders discuss the meanings behind the Swastika and the Star of David. Students also measure the angles and shapes with the symbols.
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.
Curated OER
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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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...
Curated OER
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.
Curated OER
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, learners color triangles red and rectangles blue in a given set of shapes. A reference web site is given for additional activities.
Curated OER
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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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, 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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Identify Triangles 2
In thins triangles review worksheet, students examine 4 triangles and their measurements. Students classify them as equilateral, isosceles, or scalene.