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Worksheet
Math Mammoth

Ratios 1

For Students 5th - 6th
In this ratios learning exercise, students complete several activities for ratios. Students enhance their understanding of ratios and percents.
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Lesson Plan
Curated OER

What Shape am I?

For Teachers 1st - 3rd
Students analyze characteristics of geometric shapes. They find shapes in their environment, and communicate why it is like the shape of their choice and not like another shape.
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Lesson Plan
Curated OER

Properties of Parallelograms

For Teachers 9th - 11th
Students identify different properties of parallelograms. In this geometry lesson, students complete problems that proves the theorems and properties of parallelograms. They graph the different shapes on paper.
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Lesson Plan
Pennsylvania Department of Education

A Geometric Scavenger Hunt

For Teachers 5th
Fifth graders connect their knowledge of polygons and polyhedrons. In this geometric shapes lesson, 5th graders identify and classify two- and three-dimensional objects. Students construct a polyhedron out of polygons and describe their...
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Lesson Plan
Curated OER

Translations

For Teachers 9th - 10th
Students perform translations on different polygons. In this geometry lesson, students create figures that will be used as an assessment to represent transformation. They perform hands on creation and relate it to the real world.
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Worksheet
Curated OER

Flag Day Vocabulary

For Students 3rd - 5th
In this Flag Day themed ESL worksheet, students will examine 20 Flag Day related vocabulary words and then match the words to their definitions.
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Lesson Plan
Curated OER

Area of Parallelograms

For Teachers 7th
Seventh graders review the process of finding the area of a rectangle and complete a couple of examples as a class. They discuss what a parallelogram is and what the formula would be for finding its area. They listen to an explanation...
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Handout
CK-12 Foundation

Ck 12: Geometry: Special Right Triangles Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Different types of right triangles and trigonometric ratios for special right triangles are covered in this study guide.
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Activity
Oswego City School District

Regents Exam Prep Center: Special Right Triangles

For Students 9th - 10th
A collection of lessons, practice activities, and a teacher resource that will aid your exploration and understanding of special right triangles.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: 30 60 90 Right Triangles Intermediate

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students about the 30-60-90 special right triangle and how to apply its properties.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: 45 45 90 Right Triangles Intermediate

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students about the 45-45-90 special right triangle and how to apply its properties.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Recognize 45 45 90 Right Triangles

For Students 8th
[Free Registration/Login may be required to access all resource tools.] Recognize special right triangles and their properties.
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Unknown Type
Khan Academy

Khan Academy: Special Right Triangles

For Students 9th - 10th Standards
Use your knowledge of 30-60-90 and 45-45-90 triangles to solve some problems.
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Unknown Type
McGraw Hill

Glencoe Mathematics: Online Study Tools: Special Right Triangles

For Students 9th - 10th Standards
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of special right triangles.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: 45 45 90 Right Triangles

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Apply the special properties of 45-45-90 right triangles.
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Lesson Plan
Oswego City School District

Regents Exam Prep Center: Special Right Triangles 45, 45, 90

For Teachers 9th - 10th
This Oswego City School District Regents Exam Prep tutorial shows two special formulas that are used to determined the measures of the legs of a 45-45-90 triangles. If you can't remember the formula, the tutorial gives you tips on other...
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Lesson Plan
Oswego City School District

Regents Exam Prep Center: Special Right Triangles 30 60 90

For Teachers 9th - 10th
This tutorial shows two special formulas that are used to determined the measures of the legs of 30-60-90 triangles. And if you can't remember the formula, the tutorial gives you tips on other methods you can use.
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Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Special Triangle Ratios

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Use right triangle ratios to solve for sides of triangles.
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Unknown Type
Khan Academy

Khan Academy: Special Right Triangles

For Students 9th - 10th
Use your knowledge of 30-60-90 and 45-45-90 triangles to solve some problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: 30 60 90 Right Triangles

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Apply the special properties of 30-60-90 right triangles.
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Activity
Analyze Math

Analyze Math: Special Triangles Used in Trigonometry

For Students 9th - 10th Standards
The trigonometry tutorial investigates special triangles. The activity includes isosceles right triangles and 30-60-90 triangles. The examples show how to obtain the six trigonometric ratios of the special angles using special triangles.
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Unit Plan
Lawrence Hall of Science

The Math Page: Trigonometry: The Isosceles Right Triangle

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains the trigonometry of a 45-45-90 right triangle. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to...
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Unit Plan
Lawrence Hall of Science

The Math Page: Trigonometry: The 30 60 90 Right Triangle

For Students 10th - 12th Standards
Here is a site that clearly and thoroughly explains the trigonometry of the 30-60-90 right triangle. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to...
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Activity
CK-12 Foundation

Ck 12: 45 45 90 Triangles

For Students 9th - 10th Standards
[Free Registration/Login Required] Students use a baseball field to determine the distance between points and 45-45-90 triangles. Click learn more to watch a video and click challenge me to answer a practice question.