Lesson Plan
Curated OER

Tennis Triangle

For Teachers 9th - 12th
Pupils calculate the height of a tree or flagpole. They measure the shadow of the tree or flagpole and the length of a shadow of a meterstick. Using similar triangles, calculate the heigh. Devise two additional ways in which to measure...
Worksheet
Curated OER

Unit 5: Worksheet 4 - Proportion

For Students 8th - 10th
For this proportion worksheet, students use proportions to find the length of a missing side of similar triangles. They find percent of a number, and solve real life story problems with percents and discounts. This two-page worksheet...
Lesson Plan
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Illustrative Mathematics

Applying the Pythagorean Theorem in a Mathematical Context

For Teachers 7th - 9th Standards
Participants who use this resource will apply the Pythagorean Theorem to show whether or not the shaded triangle inscribed in a rectangle is a right triangle. Once all of the sides on the shaded triangle are found, it is important that...
Activity
Administrative Office of the US Courts

Engel v. Vitale

For Teachers 10th - 12th Standards
"Is school-sponsored prayer in public schools unconstitutional?" That is the question teams debate as they consider the arguments presented to the Supreme Court in Engel v. Vitale. The attorneys study the provided talking points and...
Worksheet
Curated OER

Symmetry Fun

For Students 7th
In this symmetry worksheet, 7th graders identify and complete 12 different lines of symmetry in polygons. First, they color all of the polygons that have a line of symmetry. Then, students circle all of the regular polygons and use the...
Worksheet
Curated OER

Triangles and Congruence

For Students 8th - 10th
Can your class construct triangles and determine congruence? Find out with this well put together worksheet. THey construct triangles to given specifications and identify if they are congruent. There are 3 muti-step problems to solve.
Worksheet
Curated OER

Exploring Congruent Triangles

For Students 8th - 9th
In this congruent triangles worksheet, students solve 12 different equations related to writing a correspondence statement for triangles in the given diagrams. They complete each correspondence statement and write a congruence statement...
Lesson Plan
Curated OER

Investigating Trigonometric Ratios Through Similar Right Triangles.

For Teachers 8th - 10th
49Pupils investigate the properties of right triangles. In this geometry lesson, students differentiate between similar and congruent triangles. They use the Pythagorean Theorem to find the missing angles and sides.
Lesson Plan
Curated OER

Geography: Lengths, Perimeter, and Area of Similar Objects

For Teachers 6th
Sixth graders explore characteristics of similar objects. Using attribute blocks, they explore the ratios of the perimeter, area and side length in similar shapes. They calculate and compare the area of shapes.
Lesson Plan
Curated OER

Perimeter and Area of Similar Figures

For Teachers 9th - 12th
Students determine the relationship between perimeter, circumference, area, surface area, and/or volume of similar figures and their parts. They complete activities related to the question. Answer key included.
Lesson Plan
Curated OER

Review Geometry - Week 8 (Triangles)

For Teachers 11th - 12th
In this triangle worksheet, students use similar figures to find the length of one side of two similar triangles. They find the area of a triangle inscribed in a rectangle. This two-page worksheet contains eight problems.
Lesson Plan
Curated OER

Soda Cans

For Teachers 8th - 10th
Students identify and use properties of similar figures. In this geometry lesson plan, students use proportions of the sides of triangles to solve triangular relationships. They use soda can as their visuals.
Interactive
CK-12 Foundation

Reference Angles and Angles in the Unit Circle: Exploring Reference Angles

For Students 10th - 12th Standards
A steal of a deal — get four angles for the value of one. An interactive resource allows individuals to visualize all four angles that have the same reference angle. Pupils answer questions by using the interactive to create the...
Interactive
CK-12 Foundation

Trigonometric Functions of Negative Angles

For Students 10th - 12th Standards
When is the trigonometric value of a negative angle the same as the positive angle? Pupils compare the values of trigonometric functions for different angles and their negatives. The interactive resource provides a visual display to make...
Lesson Plan
Curated OER

Path to Mars

For Teachers 3rd - 5th
Students compare Earth and Mars to find similarities between the two planets using given websites. They collect and download pictures of geological features of both planets from print and non-print sources. Descriptions of the...
Lesson Plan
Curated OER

Why Doesn't SSA Work?

For Teachers 10th - 11th
Students investigate the relationship between angles and their sides. In this geometry lesson, students prove why SSA does not work as a true angle side relationship theorem.
Lesson Plan
Curated OER

Modeling pentagrams using Geometers Sketchpad

For Teachers 10th - 12th
Students using visual modeling software will construct two regular pentagrams which are mathematically similar. They also create a multi-page document and learn to create links between the pages and to a website on the History of...
Lesson Plan
Carnegie Mellon University

Marcellus Shale: Who Pays?

For Teachers 9th - 12th
After viewing short clips of unfortunate events, your class will consider two sides of a homeowner's court case, and then learn about the Marcellus shale deposit beneath the state of Pennsylvania and the hydraulic fracturing process. In...
Worksheet
Yummy Math

Glowing Rectangles?

For Students 6th - 8th Standards
Middle school math masters use ratios to determine the missing dimensions of various HD television screens. They also compare different dimensions of screens and determine whether or not they fit the same ratio. They perform similar...
Lesson Plan
Brigham Young University

Out of the Dust: Cubing Strategy

For Teachers 3rd - 7th
Imagine using a six-sided cube to encourage readers to analyze a topic in greater depth. Create a cube, label each of the six sides with one of Bloom's comprehension levels, and you're ready to launch a discussion of a text....
Worksheet
Savvas Learning

Putting Shapes in Order

For Students 5th - 7th Standards
Challenge math scholars with polygon word problems that require logical reasoning. They answer two word problems about geometric shapes and their arrangement in a column based on clues given. Next, learners draw a robot made of...
Lesson Plan
Curated OER

Exploring Polygons and The Greedy Triangle

For Teachers 1st - 3rd
Excellent lesson! Anne Linehane's geometry story, The Greedy Triangle, offers an opportunity to practice forming various types of polygons with your learners. Using elastic bands (or Chinese jump ropes),...
Lesson Plan
Discovery Education

Exploring Geometry

For Teachers 6th - 8th Standards
Middle schoolers construct a three-dimensional model of a city using both similar and congruent figures and geometric transformations. City must have at least ten buildings with each building labeled and may be constructed out of paper...
Lesson Planet Article
Curated OER

Thanksgiving in America

For Teachers Pre-K - 8th
A rhetorical look at Thanksgiving celebrations from all sides of the American dinner table.