Mathed Up!
Sine and Cosine Rules and Area of Triangles
Learners discover how to find missing sides and angles using trigonometry. Scholars first watch a video covering the Law of Sines and Cosines, as well as the area formula for a triangle. To test their knowledge, they complete a worksheet...
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Lines and Angles
In this lines and angles worksheet, students identify parallel and perpendicular lines. They demonstrate the characteristics of a straight line. They determine missing angle measurements. This two-page worksheet contains 3 multi-step...
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The Definition of Sine, Cosine, and Tangent
Introduce your classes to a new world of mathematics. Pupils learn to call trigonometric ratios by their given names: sine, cosine, and tangent. They find ratios and use known ratios to discover missing sides of similar...
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Prove the Pythagorean Theorem Using Similarity
Amaze your classes with the ability to find side lengths of triangles immediately — they'll all want to know your trick! Learners use the Pythagorean Theorem and special right triangle relationships to find missing side lengths.
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Right Triangle Trigonometry: Finding Missing Sides and Angles
In this right triangle trigonometry worksheet, students find the measure of specified angles. Students determine the length of the missing side of a right triangle. This four-page worksheet contains 24 problems. Answers to the worksheet...
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Indirect Measurement with Similar Triangles
Young scholars use similar triangles to find missing heights. In this using similar triangles to find missing heights lesson, students use proportions to find the heights of missing side lengths. Young scholars find the...
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Solve Right Triangle
In this trigonometric applications worksheet, students solve for the missing side of a right triangle using a trigonometric ratio. There are 46 questions, 10 of which are word problems.
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Triangle Fundamentals
For this geometry worksheet, students observe a triangle marked with three angles and are given two measures to find the missing third measure. A second diagram is given with six angles. There are 20 questions.
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Right Triangle Trigonometry: Evaluating Trigonometric Ratios
In this right triangle trigonometry worksheet, students use trigonometric ratios to determine the length of a missing side of a triangle or to find a specified angle measurement. This four-page worksheet contains 32 problems. Answers are...
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Right Triangles & Pythagorean Theorem
In this math worksheet, students find the missing angles for the right triangles using the Pythagorean Theorem. Then they label the adjacent and opposite angles.
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Angle-Side Relationships
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.
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Isosceles Triangles
Students identify the properties of an isosceles triangle. In this geometry instructional activity, students find the midpoint, median and angle bisector of a triangle. They construct angle bisectors and measure missing angles.
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Value of Triangles
In this geometry worksheet, students identify the missing sides and angles of triangles. They find the midsegment of each triangle. There are nine questions with an answer key.
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Year 10 Mathematics Triangle Test
In this math worksheet, students find the solutions to the missing angles and sides of the triangles using the correct trigonometric ratios.
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Right Triangles and The Pythagorean Theorem
Young scholars play a game to reinforce concepts of the Pythagorean Theorem. For 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...
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Exploring Angle/Pair Relationships
Students find missing angles and sides of triangles. In this geometry lesson, students create intersecting lines to measure angles. They use Cabri Software to create virtual angles.
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Algebra 2 & Trigonometry Practice: Law of Sines
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.
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Chapter 8 Test: Geometry Vocabulary
For this geometry worksheet, students match geometry words to illustrated examples. They find the missing angle of given polygons. This eight-page worksheet contains 45 problems. Answers are provided on the last two pages.
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Angles
Learners measure angles using a protractor. In this geometry lesson plan, students solve for the missing angles using equations set to the theorem of triangles. They measure missing angles through construction and identify congruent angles.
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Applying Special Right Triangles
In this geometry worksheet, 10th graders use the theorems regarding right triangles to find the missing length in a special right triangle. The one page worksheet contains eleven questions. Answers are included.
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Angles in a Triangle
In this geometry instructional activity, 10th graders determine the measure or measures of the missing angle(s) in a triangle. The one page interactive instructional activity contains four questions. Answers and hints are included.
Mathematics Assessment Project
Hopewell Geometry
Right triangles from 2,000 years ago? Learners investigate different right triangles found in the earthworks of the Hopewell people, a Native American culture that populated the United States from 200BC to AD 500. Learners apply concepts...
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Trigonometry
In this right triangles worksheet, students use trigonometric ratios to determine the length of a side of a triangle or a missing angle measurement. This two-page worksheet contains 20 problems.
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Corresponding Parts of Similar Triangles
Here is a lesson that has learners take a look at corresponding parts of similar triangles, ratios of similarity, reductions and enlargements. They'll manipulate the scale factor (r) to observe the changes in similar triangles and then...