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Triangles
Pupils identify triangles in the real world and construct their own triangle using drinking straws. They explore abstract triangles and find additional geometric shapes such as trapezoids. Students discuss similar shapes and examine the...
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Classifying Triangles
This presentation shows how triangles are classified by angle measurement and length of sides. It reviews isosceles, scalene, obtuse, right, and acute classifications and includes questions for students to classify some of the triangles...
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Number & Operations
For this number and operations worksheet, learners solve and complete 3 different sections of one problem that uses the Pythagorean theorem to solve. They use the model illustrated to determine the meaning of the Pythagorean theorem....
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Angles in a Triangle
In this online math learning exercise, students calculate the angles in a triangle given their measurements. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A...
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Perimeter of Triangles and Rectangles
Fifth graders study perimeter. In this math instructional activity, 5th graders use Cheerios to find the perimeter of various polygons. Students discuss how to figure the perimeter of triangles, squares and rectangles.
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Delta, Delta, Delta
Students construct equilateral triangles and a 'laser' triangle. In this reflection instructional activity students build a retro-reflector using mirrors.
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Shapes...the Beginning of Geometry
Students identify and name basic shapes and points. In this elementary geometry lesson, students use printable cut outs to name circles, triangles, and squares before playing a game with them. They play a game of "Pin the Tail on the...
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Rotations
For this rotations worksheet, students draw and label a rotated image for each triangle and label its center. Students complete 6 problems.
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Dilations
In this dilations activity, students draw and label dilated images for the triangles and label the centers. Students complete 6 problems total.
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Identifying Triangles
In this geometry worksheet, 10th graders identify a triangle as right, acute, or obtuse and identify the parts of a right triangle in a drop and drag game format. The one page interactive worksheet contains eight matching questions and...
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Area of Triangle Worksheet
In this area worksheet, students find the area of a triangle given the height and the base. They also find the height or base given the area of the triangle.
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Geometry Practice: G.G. 28 #2: Triangle Congruence
In this triangle congruence activity, students use SSS, ASA, AAS and HL to determine the congruence of triangles. They identify the theorem that proves congruence. This three-page activity contains 4 multi-step problems. Answers are...
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Area Problem
In this area problem, students solve a problem of the week. They determine the area of a given figure. This one-page learning exercise contains 1 problem. A detailed explanation to find the answer is provided.
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Math Club Warm Up #17b
In this area activity, 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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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.
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The Greedy Triangle
Students discuss figures with various numbers of sides. For 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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Triangle: Print and Color
In this word recognition worksheet, learners trace the word "triangle", write the word independently, and color the picture of the triangle.
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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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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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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 Shapes: Cubes, Triangles, Cones and Spheres
For this identifying shapes worksheet, 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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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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Shapes
In this learning shapes activity, students practice their fine motor skills as they trace the square, triangle, rectangle, and circle shapes.