Interactive
Curated OER

Law of Cosines

For Students 9th - 12th
In this cosine worksheet, students will find the length of the third side of a triangle given the length of the other two side. Students will use the Law of Cosines to find the length of the missing side. Answers will be rounded to 3...
Worksheet
Curated OER

The Pythagorean Theorem

For Students 9th
In this Pythagorean theorem worksheet, 9th graders solve and complete 8 different problems that include using the Pythagorean theorem to solve. First, they find the missing measure in each right triangle. Then, students make a drawing...
Worksheet
Curated OER

Mean Twisters - Mean Proportional

For Students 9th - 10th
In this mean proportional worksheet, students work in pairs to solve right triangle problems. They use ratios and proportions of similar triangles to determine a missing length. This two-page worksheet contains 16 problems.
Worksheet
Curated OER

Geometry Problem

For Students 10th
In this geometry worksheet, 10th graders analyze an equilateral triangle which is divided into right triangles and determine missing lengths.  The one page worksheet contains one problem.  Answer is provided.
Organizer
Curated OER

Year 10 Trigonometry

For Students 11th - Higher Ed
In this math worksheet, students complete the graphic organizers while filling in the missing values by using the trigonometric ratios.
Worksheet
Curated OER

Pythagoras' Theorem

For Students 8th - 9th
For this Pythagorean Theorem worksheet, learners use the Pythagorean Theorem to determine the length of a missing side. They calculate surface area of a prism. This two-page worksheet contains 4 multi-step problems.
Worksheet
Curated OER

Find the Area or Missing Length of the Polygon

For Students 7th - 10th
In this area and perimeter activity, students find the length or area of seventeen figures.  The figures examined are triangles, trapezoids, parallelograms, rectangles, and hexagons.  Some examples and solutions are provided.
Lesson Plan
Curated OER

Pythagorean Relationships

For Teachers 9th - 12th Standards
Oh that Pythagorean Theorem is so useful. Learners engage in a 45 minute learning activity that requires them to solve for missing angles and sides of a right triangle. They'll use the Pythagorean Theorem to find the rations of sides and...
Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 10th
In this geometry worksheet, 10th graders solve for missing sides and angles of a triangle. They use the pythagorean theorem to solve for the unknown in a right triangle. There are 5 questions on this worksheet.
Lesson Plan
Curated OER

The Law of Sines

For Teachers 11th - 12th
Learners define the laws of sine as it relates to a right triangle. In this trigonometry activity, students identify the properties of sine to help then find mixing sides of a right triangle. They also solve for the missing angles.
Lesson Plan
Curated OER

How are Trig Ratios Used to Measure Triangle Sides

For Teachers 8th - 11th
Students identify the ratios of trig identities. In this geometry lesson, students solve the missing sides and angles of triangles using trig ratios. They relate the graphs and waves to real life scenarios.
Lesson Plan
Curated OER

Proving Pythagoras

For Teachers 8th - 10th
Students prove the theorem of Pythagoras. In this Pythagorean Theorem lesson, students define the different parts of a right triangle. They use the Pythagorean Theorem to solve for the missing sides and angles of a right triangle.
Worksheet
Mt. San Antonio Collage

Properties of a Parallelogram

For Students 9th - 12th Standards
More than just a worksheet, the resource provides a thorough guide to navigate through the land of parallelograms. Filled with definitions and theorems, the resource supports learners through problems such as proofs and finding missing...
Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 9th - 10th
Students solve problems using the Pythagorean Theorem. In this geometry instructional activity, students identify different parts of a right triangle. They use the Pythagorean Theorem to calculate missing angles and sides.
Lesson Plan
Curated OER

The Search for Pythagoras' Treasure

For Teachers 8th - 10th
Students identify and define properties of triangles. For this geometry lesson, students identify the missing sides and angles of right triangles. They use the rules of the Pythagorean Theorem to solve their problems.
Lesson Plan
Curated OER

Polygon Sum Conjecture

For Teachers 9th - 10th
Young scholars calculate the sum of the angles of a polygon. In this geometry lesson plan, students use the interior angle formula of polygon based on the number of sides of the polygon. They identify the missing angle using algebra.
Worksheet
Curated OER

Math Worksheet: Geometry Problem (3)

For Students 9th - 11th
In this geometry worksheet, students find the missing side of a triangle within a triangle. Students use sine and cosine relationships as well as the Pythagorean Theorem.
Worksheet
Curated OER

The Pythagorean Theorem

For Students 9th - 11th
In this geometry worksheet, students solve missing parts of a triangle using the Pythagorean Theorem. There are 19 questions with an answer key.
Lesson Plan
Curated OER

Pythagorean Triple

For Teachers 8th - 10th
Students investigate the properties of the Pythagorean Theorem. In this geometry lesson, students identify the missing angles and sides of a right triangle. They label the hypotenuse and legs of a right triangle correctly.
Worksheet
Curated OER

Informal Geometry

For Students 8th - 12th
Middle and high schoolers solve and complete 29 various types of problems. First, they match each name with its correct formula. Then, learners find the length of the missing side and the distance between the two points given. In...
Lesson Plan
Curated OER

Calculating the shortest distance between two points

For Teachers 8th
Eighth graders find the length of the third side of a right triangle.
Lesson Plan
Curated OER

Trigonometric Ratios

For Teachers 10th - 12th
Students measure and analyze angles. In this trigonometry instructional activity, students measure angles and distances use non-traditional techniques. They identify the different ratios of sine, cosine and tangent.
Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 7th - 10th
Pupils find the different ratios of a triangle. In this geometry activity, students use the Pythagorean Theorem to solve for missing sides and angles on a right triangle. They use a robot to create a right triangle.
Lesson Plan
Utah Education Network (UEN)

It's All Just Similar to Me

For Teachers 7th - 8th
Middle schoolers explore the concept of similar figures. In this similar figures lesson, pupils calculate scale factors of similar triangles. They find missing sides of triangles, and measure angles using protractors and measure sides of...

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