Lesson Plan
EngageNY

Four Interesting Transformations of Functions (Part 1)

For Students 9th - 10th Standards
Understanding how functions transform is a key concept in mathematics. This introductory instructional activity makes a strong connection between the function, table, and graph when exploring transformations. While the resource uses...
Lesson Plan
EngageNY

Why Are Vectors Useful? 1

For Teachers 11th - 12th Standards
How do vectors help make problem solving more efficient? Math scholars use vectors to represent different phenomenon and calculate resultant vectors to answer questions. Problems vary from modeling airplane motion to the path of a...
Lesson Plan
Chandler Unified School District

Art Masterpiece: Leonardo’s Inventions—Leonardo da Vinci

For Teachers 6th
Leonardo da Vinci is the focus of a hands-on activity that encourages scholars to become inventors. Pupils brainstorm and sketch their idea, compose a detailed depiction using a mirror writing technique, and antique the paper for a...
Lesson Plan
Kenan Fellows

Math Made Simple as 1-2-3: Simplified Educational Approach to Algebra

For Teachers 8th - 11th Standards
Writing an equation of a line is as easy as m and b. A lesson presentation gives individuals different strategies for writing equations of lines. Some items provide a slope and a point while others provide two points. Whatever the given,...
Assessment
Concord Consortium

Circumscribed Polygon

For Students 11th - 12th Standards
Trigonometry teachers often go off on a tangent, and here's a worksheet that proves it! First, young mathematicians use a formula with tangent to prove a formula correct for area. Then, they draw conclusions about the area of a circle...
Lesson Plan
Penguin Books

An Educators' Guide to Between Shades of Gray by Ruta Sepetys

For Teachers 7th - 10th Standards
Books can help teens understand complex global issues. A helpful educator's guide introduces readers to what it's like to be a refugee. Lesson components for the novel Shades of Gray include an anticipation guide and writing and...
Assessment
Concord Consortium

Rectangle Space

For Students 9th - 12th Standards
Take a coordinated look at rectangles. The task asks pupils to plot the length and width of created triangles in the coordinate plane. Using their plots, scholars respond to questions about rectangles and their associated points on the...
Lesson Plan
Curated OER

Triangle Proofs

For Teachers 10th
Tenth graders complete a unit of lessons on congruent triangles and triangle proofs. They observe and participate in teacher-led discussions of examples of the methods to prove that triangles are congruent, and create an original proof.
Worksheet
Curated OER

Right Triangles

For Students 10th
In this right triangles worksheet, 10th graders solve 5 problems that relate to different right triangles. First, they find the values of x and y so that each triangle is congruent to the other. Then, students write a two-column proof...
Worksheet
Curated OER

Congruent Triangles

For Students 10th
In this congruent triangles worksheet, 10th graders solve and complete 10 different problems to determine whether each set of triangles is congruent or not. First, they copy each diagram onto a piece of paper and mark up the paper with...
Worksheet
Curated OER

Finding the Angle Measurements in Isosceles Triangles

For Students 9th
In this angles worksheet, 9th graders find the angle measurements in four isosceles triangles.  Two of these triangles are drawn inside a circle, where two of the sides of the triangles are formed by radii.
Worksheet
Curated OER

Recognizing Triangles

For Students 1st - 2nd
In this triangles worksheet, students analyze 25 shapes in a full page collage. Some of the shapes have curved or jagged sides. Students circle all the triangles.
Worksheet
Curated OER

Geometry and Triangles

For Students 11th - Higher Ed
In this geometry triangles worksheet, students first determine how many degrees are found in one half and in three-fifths a revolution. Then they find the supplement of the two angles given and the radius of a circle. Students also...
Worksheet
Curated OER

Using Trigonometry to Find Area

For Students 11th - 12th
In this Algebra II/Trigonometry worksheet, students use trigonometry to determine the area of a triangle or a parallelogram.  The one page worksheet contains ten problems.  Answers are not provided. 
Worksheet
Curated OER

Triangles- Lower Elementary Geometry Coloring Page

For Students 1st - 2nd
In this lower elementary geometry worksheet, students locate all of the triangles and color them green. They color triangles in the form of a Yield sign, a sandwich, a tent, and mask.
Worksheet
Curated OER

Triangle Writing

For Students 1st - 2nd
In this Language Arts instructional activity, students write inside a triangle shape. The triangle includes lines to guide students in their writing.
Lesson Plan
Curated OER

Algebra 2 & Trigonometry Practice: Law of Sines

For Teachers 9th - 12th
In this law of sines worksheet, students solve 9 multiple choice and short answer problems.  Students use the law of sines to missing side lengths and angles of triangles.
Lesson Plan
Curated OER

Interior Angles of Regular Polygons

For Teachers 9th - 12th Standards
Students investigate the interior angles of a triangle. In this geometry lesson, students create the formula to calculate the angles inside a triangle. They observe the total sum of a triangles angle on the navigator.
Worksheet
Curated OER

Triangle Review

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

Review of Triangles

For Teachers 8th - 10th
Students investigate the Pythagorean Theorem. In this geometry instructional activity, students define angles and sides of right triangles. They calculate the area and surface area using formulas derived by the Pythagorean Theorem.
Lesson Plan
Curated OER

Angle-Side Relationships

For Teachers 9th - 12th
Students calculate the different sides and angles of a triangle. In this geometry lesson, students use triangular properties to define the relationship between two triangle. They identify missing angles using the interior angle theorem.
Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 6th - 8th
Students engage in a study of the Pythagorean Theorem to classify the hypotenuse of a triangle. The teacher uses examples from the lesson to aid students in comprehension of solving problems that involve problem solving. They create a...
Lesson Plan
Curated OER

Drawing Straws

For Teachers 4th
Fourth graders examine the Triangle Inequality Theorem by investigating possible lengths of the sides of a triangle.
Lesson Plan
Curated OER

Let the Matrix Do It

For Teachers 7th - 8th
Students create a matrix of the vertices of a triangle and produce new matrices that dilate, translate, rotate, and reflect the original triangle. After multiplying each matrix by a new scale factor, they graph the new matrix and...

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