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Worksheet
Curated OER

Quiz: Beginning Congruent Triangle Proofs

For Students 10th - 11th
In this congruent triangle proof activity, learners write theorems to prove the congruence of given triangles. This one-page activity contains three given polygons to prove congruence.
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Worksheet
Curated OER

Triangle Shapes

For Students K - 2nd
In this recognizing triangle shapes worksheet, students examine 6 different pictures and draw an x on the things in each picture that are triangle shapes.
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Worksheet
Curated OER

Perimeter and Area of Triangles [C]

For Students 5th - 6th
In this triangle worksheet, students find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
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Worksheet
Curated OER

Perimeter and Area of Triangles [D]

For Students 5th - 6th
In this triangle worksheet, students find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
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Worksheet
Curated OER

Perimeter and Area of Triangles [E]

For Students 5th - 6th
For this triangle worksheet, students find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
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Worksheet
Curated OER

Proofs with Triangles

For Students 9th - 10th
In this geometry worksheet, student solve problems with triangles using proofs. They identify the solution based on SSS, SAS, ASA. There are 5 proofs tobe completed.
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Lesson Plan
Curated OER

Right Triangles and Unit Circles

For Teachers 9th - 11th
Students evaluate the six trigonometric values of a trig function. For this trigonometry lesson, students use the Unit Circle to find the values of right triangles and their angles. They identify an angle of elevation and depression.
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Lesson Plan
Curated OER

The Greedy Triangle - Group Activity

For Teachers K
Students explore different shapes and identify them. They make a community map using triangles, rectangles, circles, ovals, squares, pentagons, and hexagons.
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Organizer
Curated OER

Triangle Dot Paper

For Students 6th
In this math worksheet, students see a whole page grid of triangle dots. There are no directions on the page which is labeled as a learning tool for grade 6.
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Lesson Plan
Curated OER

Understanding the Epidemiologic Triangle through Infectious Disease

For Teachers 7th - 10th
Students examine the epidemiologic triangle. In this disease lesson, students discuss infectious disease as they study how they spread and discover their families' experiences with them. Students research Internet sites to complete...
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Worksheet
Curated OER

Triangle and Circle Trigonometry

For Students 11th - 12th
In this Pre-calculus/Trigonometry worksheet, students apply advanced triangle and circle trigonometry to solve application problems. The three page worksheet contains sixteen problems. Answers are not included.
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Lesson Plan
Curated OER

Exploring Characteristics Needed to Prove Two Trianlges Congruent

For Teachers 10th
Tenth graders explore congruent triangles.  In this geometry lesson, 10th graders investigate the conditions necessary to prove two triangles congruent.  The lesson combines dry erase board activities and the use of technology.
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Lesson Plan
Curated OER

Optical Illusion

For Teachers 8th - 10th
Students practice creating optical illusions as well as discerning how perception of information may change its characteristics. They distinguish between an equilateral triangle, endpoints, vertices's, and segments of triangles. The...
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Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 7th - 8th
Students discover the Pythagorean Theorem.  In this discovering the Pythagorean Theorem lesson, students measure the lengths of various triangles to the nearest centimeter. Students record their measurements in a table.  Students square...
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Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 8th
Eighth graders draw right triangles and identify the parts of a right triangle: right angle, interior and exterior angles, hypotenuse and legs. They predict and identify any relationships that exist between the sides of a right...
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Lesson Plan
Curated OER

Congruent Trianges - Is This Enough Information?

For Teachers 7th
Seventh graders determine whether two triangles are congruent and provide an explanation to why they are not. They apply concepts of measurement of angles and collect evidence of congruent angles in the world.
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Lesson Plan
Curated OER

Leadership Program in Discrete Mathematics

For Teachers 6th - 8th
Students, using Pascal's triangle, find the number of items given each day in the song, "The 12 Days of Christmas."
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Worksheet
Curated OER

Pythagorean Theorem

For Students 9th - 10th
For this Pythagorean theorem worksheet, students solve and complete 20 different problems that include using the Pythagorean theorem to solve them. First, they use the Pythagorean theorem to determine the value of x in each right...
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Worksheet
Curated OER

The Law of Sines

For Students 9th - 12th
In this law of sines worksheet, students use the law of sines to find the missing measurement in a triangle. They determine the value of angles and the lengths of triangles. Students compute the area of triangles. This four-page...
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Worksheet
Curated OER

Pythagorean Theorem

For Students 10th
In this Pythagorean Theorem worksheet, 10th graders solve and complete 19 various types of problems. First, they draw the square shown and divide its sections as shown. Then, students cut out the 6 parts of the square and rearrange the 4...
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Lesson Plan
Curated OER

Geometry Practice: Area of Polygons #8

For Teachers 9th - 12th
For this area of polygons worksheet, young scholars solve 7 short answer and multiple choice questions about area.  Students find the area of triangles given base and height, or points in the coordinate plane.
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Lesson Plan
Curated OER

Pythagoreum Theorem

For Teachers 6th - 8th
Students practice assessing how to apply the formulas for the area of parallelograms and triangles. They recount the contributions of Pythagoras and apply the theories of the Pythagorean theorem in a group project to calculate the...
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Lesson Plan
Texas Instruments

What's the Trig?

For Teachers 9th - 12th Standards
Learners determine the trigonometric relationships within a triangle as they construct a right triangle on the Ti-89. They find the sine, cosine, and tangent of various angles of their triangle construction.
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Worksheet
Curated OER

Area

For Students 7th - 8th
In this area learning exercise, students solve and complete 20 different problems that include the measurement of various figures. First, they determine the area of each of the triangles, parallelograms and trapezoids. Then, students...

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