Worksheet
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Identify Triangles #3

For Students 3rd - 5th
In this triangle worksheet, learners identify triangles as obtuse, right, or acute, checking the correct answer. A reference web site is given for additional activities.
Worksheet
Curated OER

Identify Triangles

For Students 4th - 6th
In this triangles worksheet, students identify triangles as either Acute, right or obtuse. A reference web site is given for additional activities.
Worksheet
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Identify Triangles #2

For Students 5th - 6th
In this triangle worksheet, students identify a set of 4 triangles as either equilateral, isosceles or scalene. A reference web site is given for additional activities.
Lesson Plan
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Tri this Angle!

For Teachers 1st
First graders draw and describe various types of polygons. they investigate their own environments for examples of polygons. After reading the book, The Greedy Triangle, they discuss everyday objects that are polygons. They create shape...
Lesson Plan
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Obtuse Angles

For Teachers 3rd
Third graders recognize and identify geometric shapes, work with manipulatives to reinforce understanding, and create polygons with various angles to display their knowledge of the different types of angles.
Worksheet
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Make a Volcano Foldable

For Students 5th - 8th
In this volcano activity, students make a "foldable" for the three types of volcanoes. They identify the volcano types, the type of lava, the type of eruption, the location of the volcano and the slope on one of three cards in the...
Worksheet
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Make Shapes and Describe Their Features

For Students 3rd - 4th
In this shapes and their features worksheet, students construct triangles, quadrilaterals, pentagons, hexagons, and heptagons using four designated shapes. In this problem solving worksheet, students create as many of the types of shapes...
Lesson Plan
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Hello My Name is . . . Helvetica

For Teachers Pre-K - 1st
Students play various games to help create a classroom community. In this name recognition instructional activity, students combine their name recognition skills with newly learned art and geometric vocabulary. First students discover...
Lesson Plan
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Committing Crime or Just Having Fun?

For Teachers 6th - 9th
Students breakdown different types of youth crime/gangs. Students evaluate the power of peer pressure. Students identify and offer advice for dealing with peer pressure. Students encounter the theory of phenomena.
Lesson Plan
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Insect Collection

For Teachers 9th - 12th
Learners explore how to use several types of insect sampling and collectin equipment. They work in groups to collect insects in different areas of their schoolyard. Students are explained that quadrats are generally used to randomly...
Lesson Plan
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Angling Your Way Through a Picture

For Teachers 5th - 7th
Students look at the geometry in an artwork. In this art history/geometry lesson, students research the artist Charles Sheeler and look at his painting Stacks in Celebration. They find the different types of lines, angles, and...
Lesson Plan
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It Matters

For Teachers 2nd - 3rd
Young scholars use descriptive vocabulary to discuss the attributes of matter. Then, they sort objects or pictures by the type of matter they are comprised of. Finally, students match objects of matter with similar attributes and...
Lesson Plan
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Deric's Blotto

For Teachers 9th - 10th
Learners solve the handshake problem and investigate triangular numbers. In this geometry lesson, students investigate Blotto games as they apply concepts of triangles and geometric theorems.
Lesson Plan
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Marshmellow Geometry

For Teachers 5th - 10th
Students explore a variety of geometric shapes, name them, and list their characteristics. The shapes are transposed into structures and checked for accuracy.
Lesson Plan
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Incenter of a Triangle

For Teachers 10th
Tenth graders explore the properties of the incenter of a triangle. In this geometry lesson, 10th graders construct a triangle and the angle bisectors of each angle. The dynamic properties of Cabri Jr. allow students to locate and...
Lesson Plan
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Pythagorean Theorem

For Teachers 6th - 8th
Middle schoolers investigate the concept of the Pythagorean Theorem. After conducting independent practice to find the hypotenuse of a triangle, they work with the teacher using examples in the lesson plan. The direct instruction is...
Lesson Plan
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Exploring Areas of Irregular Polygons

For Teachers 9th - 12th Standards
Students solve for the area of different polygons. In this geometry lesson, students identify and differentiate between regular and irregular polygons. They use properties of irregular polygons to solve problems.
Worksheet
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Area, Perimeter and Volume

For Students 7th - 8th
In this area, perimeter and volume worksheet, students solve and complete 12 various types of problems. First, they calculate the value for each variable in the triangle shown. Then, students find the distance of the ladder against a...
Worksheet
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More on Tessellations

For Students 10th
For this tessellations worksheet, 10th graders solve 3 different word problems that include creating various tessellations. First, they group pentagons around a vertex so the angles add up to 360 and determine whether the pentagons can...
Lesson Plan
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Polygon Mobiles

For Teachers 4th - 6th
Students explore a variety of shapes and angles and create mobiles with information about a selected polygon. Both common and "not-so common" polygons are examined.
Lesson Plan
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Discovering Perimeter

For Teachers 12th
Twelfth graders apply perimeter measurement to items found in newspapers and calculate the cost in terms of feet or yards. They share answers and explanations with classmates.
Worksheet
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Trapezoids

For Students 10th
In this trapezoids activity, 10th graders solve 10 different types of problems related to measuring trapezoids. First, they identify the isosceles trapezoid on the sheet with the bases MA and TH. Then, students use the given information...
Worksheet
Curated OER

Quadrilaterals and their Diagonals

For Students 10th
In this quadrilaterals and their diagonals worksheet, 10th graders solve 3 problems related to determining various types of quadrilaterals. First, they draw the diagonals for each of the quadrilaterals and determine for which the...
Worksheet
Curated OER

Reading: Games

For Students 3rd - 4th
For this games worksheet, students read the names of 5 common games. Students then read 5 paragraphs that describe the origin of a game. Students guess the name of each game and write it in the blank space.

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