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Worksheet
Curated OER

Triangle Review

For Students 5th - 6th
In this triangle review worksheet, students define what type of triangle is being described, then draw a picture of it. A reference web site is given for additional activities.
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Worksheet
Curated OER

Tracing Triangles

For Students 1st - 3rd
In this tracing triangles learning exercise, students recognize, trace, and draw different forms and sizes of triangular figures. Students complete two triangle activities.
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Lesson Plan
Curated OER

Shape Up

For Teachers 6th - 8th
Students explore differents types of triangles and quadriaterals. For this polygon lesson, students  model identify and compare two and three dimensional geometric figures. Students create tangrams and discover the difference between...
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Worksheet
Curated OER

2-Dimensional Shapes: Drawing Shapes

For Students 2nd - 3rd Standards
Some of the best practice with shape identification comes from drawing the figures first-hand. Young geometers draw nine two-dimensional shapes: rectangle, circle, square, pentagon, hexagon, octagon, triangle with three equal sides,...
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Activity
Teach Engineering

Stay in Shape

For Teachers 7th - 9th Standards
Using their knowledge of right triangles, pupils find out how far a ship is from a light house. Class members determine how far around the world a ship would be sailing at a constant speed.
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Lesson Plan
Curated OER

Shapes and Tools

For Teachers K - 1st
Young learners view different shapes drawn by the teacher on the board. The teacher identifies each shape by name and discusses the importance of knowing the difference between shapes when building something. The pupils complete the...
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Lesson Plan
Curated OER

Mathematical Modeling

For Teachers 9th - 12th
Study various types of mathematical models in this math lesson plan. Learners calculate the slope to determine the risk in a situation described. They respond to a number of questions and analyze their statistical data. Then, they...
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Worksheet
Curated OER

Identify Triangles 2

For Students 2nd - 5th
In thins triangles review activity, students examine 4 triangles and their measurements. Students classify them as equilateral, isosceles, or scalene.
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Worksheet
2
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Curated OER

2-Dimensional Shapes: Coloring Shapes

For Students K - 1st Standards
For beginners to color, number, and shape theory, this is a great way to solidify skills. They use a key at the top to determine which color (yellow, green, purple, or blue) to shade each shape (square, triangle, circle, and rectangle,...
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Lesson Plan
Centers for Disease Control and Prevention

Understanding the Epidemiologic Triangle through Infectious Disease

For Teachers 6th - 8th Standards
Introduce infectious diseases and the epidemiologic triangle. A helpful resource describes the agent, host, and environment from the three vertices as well as the time factor, which is in the middle. Scholars complete a simple...
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Worksheet
Curated OER

Number Sense and Numeration: Square Roots

For Students 8th
In this square roots worksheet, 8th graders solve 14 different types of problems to include determining the square root of a number of problems, determining the area of a rectangle and the length of a side of a square with the same...
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Lesson Plan
Curated OER

Guess My Shape

For Teachers Pre-K - 1st
Learners play a game with shapes. They work in groups to identify the names and characteristics of various shapes. They give each other clues to see if others can identify the shape being described. This is a great hands on activity.
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Lesson Plan
Illustrative Mathematics

Alike or Different Game

For Teachers K Standards
How are a circle and triangle alike? How are they different? These are the types of questions children will answer while playing this fun geometry game. Including a variety of conventional and unconventional shapes, this activity allows...
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Assessment
Concord Consortium

Three Rubber Bands

For Students 7th - 12th Standards
Stretch your mind about triangles. Given a triangle, scholars consider a smaller triangle formed when they stretch three rubber bands from each vertex to the opposite side. They determine the ratios of the areas and perimeters of the...
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Lesson Plan
Curated OER

Scalene Triangles

For Teachers 5th
Fifth graders identify and classify scalene, equilateral, and isosceles triangles. In this triangle activity, 5th graders define the different attributes of 3 types of triangles and sort them by descriptions and comparisons. Students...
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Interactive
Curated OER

Triangle Problems - Find the Height given the Area

For Students 9th - 12th
In this online math instructional activity, students find the height of 5 triangles given their area. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific...
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Interactive
Curated OER

Angles in a Triangle

For Students 9th - 12th
In this online math worksheet, 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 terrific...
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Lesson Plan
Curated OER

Triangle Classification

For Teachers 9th - 12th
Students classify different types of triangles. For this geometry lesson, students identify and use properties of triangles. They differentiate between isosceles and equilateral triangles.
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Lesson Plan
Curated OER

Triangle Congruence

For Teachers 9th - 11th
Students use web applet to create congruent triangles. In this geometry lesson, students differentiate between congruent and similar. They create shapes online and drag those shapes around to create visuals of triangles.
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Worksheet
Curated OER

Constructing Triangles

For Students 5th - 6th
In this constructing triangles online instructional activity, students construct thirteen triangles on paper first and then type in their answers on line. Students can check their answers as they go and the computer calculates the...
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Worksheet
Curated OER

Congruent Triangles

For Students 10th
In this congruent triangles instructional activity, 10th graders solve and complete 16 different types of problems. First, they name the corresponding parts of the congruent triangles shown and draw a picture. Then, students list the...
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Lesson Plan
Curated OER

Identifying Triangles

For Teachers 6th
Sixth graders identify and define a variety of triangles. In this identification of triangles lesson, 6th graders draw examples of each triangle on a whiteboard, then complete a worksheet.
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Lesson Plan
Curated OER

Isosceles Triangles

For Teachers K - 2nd
Students investigate triangles. In this shapes geometry lesson, students define and state the attributes for equilateral, scalene, and isosceles triangles. Students locate the prefix "tri" in a variety of words and make connections with...
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Lesson Plan
Curated OER

Triangle Puzzler

For Teachers 5th - 8th
Students are introduced to some basic concepts of geometry. They explain that the definition of a triangle is a figure with three sides, three angles, and three points. Triangles can be named by using three points in their correct sequence.

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