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Activity
Ministry of Education and Employment of Spain

Red Escolar: Un Triangulo Sorprendente

For Students 9th - 10th Standards
In Spanish. Different activities which involve the following concepts: right triangles, perpendicular lines, classification of triangles, area of a square and Pythagorean theorem.
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Lesson Plan
Alabama Learning Exchange

Alex: Card Table Project

For Teachers 9th - 10th
Students will work in groups to design a card table. Students will communicate with each other through a class blog or class discussion page. Students will then work in groups to design a card table. After the design phase, students will...
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Unit Plan
Cuemath

Cuemath: Pythagoras Theorem

For Students 9th - 10th Standards
In this lesson, you will learn about the Pythagoras theorem, its derivations, and equations followed by solved real-world problems on the Pythagoras theorem triangle and squares.
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eBook
Math Planet

Math Planet: Geometry: Mean and Geometry

For Students 9th - 10th Standards
The geometric mean is explained through examples and a video lesson. [1:12]
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Unknown Type
Khan Academy

Khan Academy: Use Pythagorean Theorem to Find Area and Perimeter

For Students 7th - 8th
Find the area and perimeter of triangles and quadrilaterals by first using the Pythagorean Theorem to find missing side lengths. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or...
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Unknown Type
Khan Academy

Khan Academy: Pythagorean Theorem in 3 D

For Students 7th - 9th Standards
In this exercise, students practice using the Pythagorean Theorem to find the side lengths of triangles within a 3-D solid. Students receive immediate feedback and have the opportunity to watch a video, get hints, or try questions...
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Activity
Pennsylvania State University

Pennsylvania State Univ.: Trilingual Packaging Dilemma

For Students 9th - 10th Standards
This site from the Pennsylvania State University provides a hands-on activity to bridge the gap between right triangles, 30-60-90 and 45-45-90 theorems, and trigonometry, and what every student wants to know, "When will I ever use this?"...
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Activity
Mr. Martini's Classroom

Mr. Martini's Classroom: Right Angle Trigonometry

For Students 9th - 10th Standards
Explore sine, cosine, and tangents compared to the selected angle.
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Activity
Texas Instruments

Texas Instruments: The Tangent Ratio

For Teachers 9th - 10th Standards
In this activity students explore the tangent ratio. Students construct a right triangle using perpendicular lines, and a line that forms the hypotenuse of the triangle. When students construct the hypotenuse line it is very important...
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Activity
Texas Instruments

Texas Instruments: Real Life Real World Activity Carpentry

For Teachers 9th - 10th Standards
Carpenters use applications of geometry in their work, including the properties of right triangles and circles. This activity uses Cabri Jr. Geometry software to make measurements and solve problems based on carpentry situations....
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Interactive
Quia

Quia: Geometric Terms Concentration

For Students 3rd - 8th
Do you need practice remembering or learning different geometry vocabulary words and definitions? This concentration game is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if...
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Interactive
Quia

Quia: Geometric Terms Flash Cards

For Students 2nd - 8th Standards
Do you need practice remembering or learning different geometry vocabulary words and definitions? The flash cards at this web site are for you! There is a link to a list of terms with definitions you can click if you want to see if you...
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Interactive
Quia

Quia: Geometric Terms Word Search

For Students 3rd - 8th
Do you need practice remembering or learning different geometry vocabulary words and definitions? This word search is the web site for you! There is a link to a list of terms with definitions you can click if you want to see if you are...
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Handout
The Math League

The Math League: Figures and Polygons

For Students 9th - 10th Standards
This site provides definitions of different types of polygons and figures.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Applications Using the Pythagorean Theorem

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] In this lesson students use the Pythagorean Theorem to find lengths and distances. Students watch a video tutorial, explore guided notes and attempt practice problems.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Applications Using the Pythagorean Theorem

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] In this lesson students use the Pythagorean Theorem to find lengths and distances. Students watch a video tutorial, explore guided notes and attempt practice problems.
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Unit Plan
Khan Academy

Khan Academy: Hypotenuse, Opposite, and Adjacent

For Students 9th - 10th
In a right triangle, the hypotenuse is the longest side, an 'opposite' side is the one across from a given angle, and an 'adjacent' side is next to a given angle.
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Unit Plan
Khan Academy

Khan Academy: Intro to Inverse Trig Functions

For Students 9th - 10th Standards
Learn about arcsine, arccosine, and arctangent, and how they can be used to solve for a missing angle in right triangles.
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Activity
Rice University

Rice University: Cynthia Lanius: Hidden Polygon Activity

For Students 4th - 7th Standards
On this site students are instructed to locate different types of polygons on triangle grid paper. This page can be printed so that students can actually draw them. It also gives a definitions link for each polygon.
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Handout
Calculator Soup

Calculator Soup: Pythagorean Theorem Calculator

For Students 9th - 10th Standards
This calculator solves the Pythagorean Theorem equation for sides a or b, or the hypotenuse c. The hypotenuse is the side of the triangle opposite the right angle.
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Activity
University of Cambridge

University of Cambridge: Nrich: Disappearing Square

For Students 9th - 10th Standards
This one page website explains how to find the area of a triangle with an interactive graphic. It then offers a challenge. The solution is available right at the website.
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Unknown Type
Khan Academy

Khan Academy: Distance Between Two Points

For Students 7th - 8th Standards
In this exercise, students practice using the distance formula, which is derived from the Pythagorean Theorem, to find the distance between two points on a coodinate grid. Students receive immediate feedback and have the opportunity to...
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Inverse Trigonometric Ratios

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Use the inverse trigonometric ratios.
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Unknown Type
Khan Academy

Khan Academy: Pythagorean Theorem Word Problems

For Students 7th - 8th
Use the Pythagorean theorem to solve word problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.