Solving Triangles Teacher Resources
Find Solving Triangles educational ideas and activities
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I'm So Sorry I Ate Chocolate
Sixth graders investigate the magnitudes of the sides and angles of a triangle. They determine the proof of the Sine Rule before using it to solve triangles. They compare the Sine Rule to the Cosine Rule in this unit of lessons.
The Law of Cosines
In this law of cosines worksheet, 10th graders solve and complete 12 various types of problems. First, they find each indicated measure and give lengths to the nearest tenth and angles to the nearest degree. Then, students solve each triangle illustrated.
Leveled Problem Solving Triangles
In this triangles practice worksheet, students sharpen their problem solving skills as they solve 6 story problems.
Using the Law of Sines and the Law of Cosines to Solve Triangles
In this trigonometry worksheet, students apply the Law of Sines and Cosines to solving for missing sides of a triangle. There are 5 questions with an answer key.
Applying Laws of Sines and Cosines
How does the Law of Sines differ from the Law of Cosines? Learners, working cooperatively in small groups, try to gain insight into this question. The activities center around using both laws in different scenarios including real-world examples.
Use this complete lesson plan to introduce geometers to inverse trigonometric functions. Learners use trigonometric ratios to solve triangles when an angle measure is known, then explore using the inverse process when only side lengths are given. The exploration naturally leads to a discussion about use of the inverse trigonometric function keys on the calculator. The lesson also includes five practice problems, three of which are real-world scenarios. Each practice problem has multiple parts.
Use this worksheet to give your geometers practice in using inverse trigonometric functions to solve triangles. The sheet contains five problems, three of which are real-world scenarios. Each problem consists of multiple parts. The worksheet could be used for practice or homework after an introductory lesson on using inverse trigonometric functions, or it could be used for assessment. Solutions to exercises are not provided.
The Law of Sines and the Law of Cosines
In this college level trigonometry worksheet, students apply the Law of Sines and the Law of Cosines to solve triangles. The four page worksheet contains forty-four problems. Solutions are not provided.
Looking for answers? This app has a wide range of problem-solving capabilities from simple formulas to complicated conversions and physics problems.
In this trigonometry worksheet, students solve for trigonometric functions. They convert between radians and angles using the properties of sine, cosine and tangent. There are 30 problems on this handout.
High schoolers find triangular angles using the angle theorem. In this geometry activity, students describe labeled triangles, use the pythagorean theorem, and rewrite information about triangles in standard form.
Students apply the definition of similar triangles to solve problems. In this geometry lesson, students use the similarity theorem to solve triangles proportion problems. They calculate lengths of certain line segments.
Triangle Inequality Theorem
Students use the inequality theorem to solve triangles and their properties. In this geometry lesson, students are given spaghetti of different lengths and asked to create triangles. They conclude the necessary length needed to make a triangle and relate it to the inequality theorem.
Going Around In Circles: The Unit Circle
Students apply properties of a unit circle to solve triangle problems. In this geometry lesson, students identify the six trigonometric values using the unit circle and the right triangle.
Arclength and Trigonometric Graphs
Students calculate the third quantities. In this trigonometric lesson,students are given information about the arc length and angle or radius and asked to find the radius or arc length. They use the unit circle to help find their answers.
What's My Angle, Pythagoras? (Pythagorean Theorem)
Students solve problems using the Pythagorean Theorem. In this geometry lesson, students solve for the missing angles of triangles. They apply ratios of the Pythagoras formula to solve for the missing side and angles.
Students calculate the different sides and angles of triangles. For this geometry lesson, students use the properties of triangles to identify congruent and similar triangles. They use trig to find angles of triangles.
Law of Sines and Law of Cosines
Students explore the concept of law of sines and cosines. In this law of sines and cosines lesson, students use the law of sines and cosines to solve triangles that are right triangles and non-right triangles.
The Law of Sines
In this law of sines worksheet, 10th graders solve and complete 15 different types of problems. First, they find the indicated measure in a given triangle. Then, students find the measure of the indicated angle of a triangle to the nearest degree.
An Application of Congruence
Learners solve triangles using the properties if congruency. In this geometry lesson, students apply congruent and similar figures to solve real world and math problems. They show they are able to follow instructions.