+
Lesson Plan
Curated OER

Special Right Triangles

For Teachers 7th - 9th
Students identify the different parts of a right triangle. In this geometry lesson, students use the Pythagorean Theorem to identify missing sides and angles of a right triangle. They work with irrational and rational roots.
+
Worksheet
Curated OER

Chapter 6: Geometry Perimeter and Area

For Students 10th - 12th
In this perimeter and area activity, students find the perimeter of various polygons.  They compute the perimeter, surface area, circumference, and volume of given figures.  Students explore trigonometric ratios.  This twelve-page...
+
Lesson Plan
Curated OER

Right Triangles and The Unit Circle

For Teachers 8th - 10th
Young scholars solve right triangles using trigonometry. In this geometry instructional activity, students use the unit circle to identify different trig values. They identify the six trigonometric identities.
+
Lesson Plan
Curated OER

Right Triangles and The Pythagorean Theorem

For Teachers 8th - 9th
Students play a game to reinforce concepts of the Pythagorean Theorem. In this geometry lesson, students find the missing angle and lengths of a right triangle. They use properties of trigonometry about sine, cosine and tangent to solve...
+
Worksheet
Curated OER

Sixteen Angle Pre-calculus Trig Problems

For Students 11th - Higher Ed
In this angle worksheet, students solve ten multiple choice and six free response questions.  These precalculus questions cover angles, radians, and right triangles.
+
Worksheet
Curated OER

Using Slope Angles

For Students 10th
In this geometry worksheet, 10th graders use right triangle trigonometry to solve problems involving angle of elevation or depression. The one page worksheet contains eleven problems. Answers are not provided. 
+
Worksheet
Curated OER

Geometry Worksheet: Pythagoras' Theorem

For Students 6th - 8th Standards
In this Pythagorean Theorem worksheet, middle schoolers use the Pythagorean Theorem to find the length of the unlabeled side of the right triangle. There are 8 problems all together.
+
Worksheet
Curated OER

Geometry Problem

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

Tangrams

For Students 6th - 8th
In this tangram worksheet, students form a square using tangrams.  Afterwards, they form additional shapes with tangrams.  This one-page worksheet contains 180 tangram shapes for students to create  by placing tangram shapes together.
+
Worksheet
Curated OER

Find the Missing Side of the Right Triangle

For Students 6th - 8th
In this find the missing side of the right triangle worksheet, learners use the Pythagorean theorem to find the missing side, given the other 2 lengths, for 4 triangles.
+
Worksheet
Curated OER

The Law of Cosines

For Students 11th - 12th
In this Law of Cosines worksheet, students are asked to demonstrate the ability to apply the Trigonometric Law of Cosines and the Inverse Law of Cosines to solve for sides and angles of right triangles. 
+
Worksheet
Curated OER

Inverse Functions in Trigonometry

For Students 9th - 10th
In this inverse functions in trigonometry worksheet, students find the missing angles in eight right triangles, given the length of two sides.
+
Worksheet
Curated OER

Using the Pythagorean Theorem

For Students 7th - 8th
In this using the Pythagorean Theorem worksheet, learners use the Pythagorean Theorem to find the missing information for ten right triangles.
+
Lesson Plan
Curated OER

Altitude Locator

For Teachers 9th - 12th
Students use protractors, strings, and straws to construct a device used to determine the height of tall objects. In this applied geometry lesson, students use common objects to construct a tangent height guide. They use principles of...
+
Lesson Plan
Curated OER

Roll It! Creating an Entrance Ramp

For Teachers 9th - 12th
Students explore the concept of triangles.  In this triangles lesson, students are to propose a plan for a ramp at their school.  Students use the Pythagorean Theorem and trigonometry to determine the length, height, and angle of the...
+
Worksheet
Curated OER

Identifying Triangles

For Students 7th - 9th
In this triangles practice worksheet, students respond to 4 questions that require them to identify the pictured triangles as acute, right, obtuse, scalene, isosceles, or equilateral triangles.
+
Worksheet
Curated OER

Identifying Triangles

For Students 5th - 7th
In this triangles practice worksheet, students respond to 4 questions that require them to identify the pictured triangles as acute, right, or obtuse triangles.
+
Lesson Plan
Curated OER

Triangles

For Teachers 5th - 6th
Young scholars draw triangles. In this shapes lesson, students discuss what they already know about triangles, what they are and what they are made up of. Young scholars discuss the types of triangles and practice drawing each type.
+
Lesson Plan
Curated OER

Designing a Fort

For Teachers 6th - 7th
Students explore the concept of right triangles. In this right triangle lesson, students construct a scale model of a tourist attraction similar to Fort Jefferson. Students research aerial photos of Fort Jefferson, then build their...
+
Worksheet
Curated OER

Right Triangle

For Students 8th - 9th
In this right triangle activity, students find the length of sides of a right triangle. This one-page activity contains 1 problem.
+
Worksheet
Curated OER

Right Triangle

For Students 8th - 9th
In this right triangle worksheet, learners find the lengths of the sides of a triangle. This one-page worksheet contains 1 problem.
+
Worksheet
Curated OER

Right Triangles

For Students 10th
In this right triangles worksheet, 10th graders solve and complete 12 different types of problems. First, they solve for a variable given each of the right triangles with the sides as indicated. Then, students determine the shorter...
+
Worksheet
Curated OER

Pythagorean Theorem Worksheet

For Students 8th - 11th
In this Pythagorean theorem worksheet, students solve 24 problems in which they find the missing side of a ride triangle given the length of 2 sides.
+
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...