Curated OER
Finding Area of Triangles
In this area of triangles activity, students calculate the area of 4 given triangles, writing total area beneath each. A reference web site is given for additional activities.
Curated OER
Area of Triangles
In this area learning exercise, students calculate the area of 4 triangles, writing answers in rectangles beneath each triangle. A reference web site is given for additional activities.
Curated OER
Area of Triangles
In this area of triangles activity, students calculate area for a set of 4 triangles, writing total area beneath each. A reference web site is given for additional activities.
Curated OER
Area of Triangles
In this area of triangles activity, students calculate the area of 4 given triangles, writing the answers in rectangles beneath each. A reference web site is given for additional activities.
Curated OER
Constructions and Angles
In this triangle constructing and classifying worksheet, students read through a tutorial on triangles and angles. Then, students complete 17 exercises in which they answer questions about angles and triangles. By clicking on the "Check"...
Curated OER
Exploring the Hinge Theorem
Students 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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Triangle Side Lengths and Angles Measures
Learners identify missing sides and angles. In this geometry lesson, students use triangular theorems to identify the missing sides. They use the Pythagorean Theorem to find the different ratios of each side.
Pennsylvania Department of Education
Kites: On the Right Track
Students use the Pythagorean theorem to discover the relationships between the lengths of sides of a right triangle. In this right triangles lesson plan, students use their reasoning and mathematical skills.
Curated OER
Angle-Side Relationships
Students calculate the different sides and angles of a triangle. For this geometry lesson, students use triangular properties to define the relationship between two triangle. They identify missing angles using the interior angle theorem.
Curated OER
Plenty of Pythagoras
Using a twelve foot knotted rope, students form a 3-4-5 right triangle. Following a discussion of observations about the lengths of the sides of the triangle, students use grid paper, scissors and a centimeter ruler to draw and measure...
Curated OER
ARE YOU A TRIANGULATEER?
Students explore about triangles and their relationship to the worlld around them. They are able to identify triangular shapes in their environment. Students are able to communicate to one another their understanding of triangles outside...
Curated OER
Tessellation Trial and Error
In this interactive instructional activity, students review attributes of equilateral polygons. They are introduced to the concept of a tessellation. Using protractors and pre-cut shapes, students arrange a variety of tiles to create...
Curated OER
Pythagorean Theorem
Students are introduced to the Pythagorean theorem. They use three different activities that give students the opportuntiy to observe triangles, and use the Pythagorean theorem and practice different ways of determining areas of...
Curated OER
Designing a Fort
Students explore the concept of right triangles. In this right triangle lesson, students construct a scale model of a tourist attraction similar to Fort Jefferson. Students research aerial photos of Fort Jefferson, then build their...
Curated OER
Pythagorean Theorem Worksheet
In this online math worksheet, students use the Pythagorean Theorem to determine if given triangles are "right" triangles. This excellent resource allows the students to check their answers, and to get "hints" should they run into...
Curated OER
Drawing Straws
Fourth graders examine the Triangle Inequality Theorem by investigating possible lengths of the sides of a triangle.
Curated OER
Let the Matrix Do It
Pupils create a matrix of the vertices of a triangle and produce new matrices that dilate, translate, rotate, and reflect the original triangle. After multiplying each matrix by a new scale factor, they graph the new matrix and describe...
Curated OER
Pythagorean Theorem
Students engage in a study of the Pythagorean Theorem to classify the hypotenuse of a triangle. The teacher uses examples from the instructional activity to aid students in comprehension of solving problems that involve problem solving....
Curated OER
Geometric Mean and the Pythagorean Theorem
In this geometric mean and Pythagorean Theorem instructional activity, 10th graders solve 9 problems related to determining the geometric mean by applying the Pythagorean Theorem in each problem. First, they find the geometric mean...
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Pythagorean Theorem Word Problems
In this Pythagorean theorem learning exercise, 10th graders solve 10 different word problems that include using the Pythagorean theorem in each. First, they determine the height of an equilateral triangle. Then, students determine the...
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The Pythagorean Theorem
In this Pythagorean theorem worksheet, 9th graders solve and complete 8 different problems that include using the Pythagorean theorem to solve. First, they find the missing measure in each right triangle. Then, students make a drawing...
Curated OER
Circumference and Area
In this circumference and area activity, 10th graders solve nine problems relating to geometric shapes. They find the circumference of a circle and the perimeter of a triangle and a six-sided figure. Students also find the area of a...
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Shape and Space: Circles
Students create isosceles triangles. In this triangles lesson, students participate in a quick fire exercise with combinations of numbers totaling 180. Students complete a worksheet with several problems.
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Area and Perimeter
For 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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