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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.
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Worksheet
Curated OER

New York State Testing Program: Mathematics Test Book 1

For Students 7th - 8th
For this mathematics test bookelt, learners solve problems studied during the year.  They solve problems covering topics such as probability, angle intersection, commission, percent, exponents, similar figures, and reading and...
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Lesson Plan
Curated OER

High School Examination: Algebra 2/Trigonometry

For Teachers 10th - 12th
In this high school worksheet, learners solve problems involving angles, functions, square roots, and sequences.  They read word problems, write equations, and then solve them.  This 28-page worksheet contains 39 problems. 
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Worksheet
Curated OER

Inverse Trigonometric Values

For Students 11th - 12th
In this trigonometry activity, students solve functions using the properties of inverse trig. They write out the 6 trigonometric functions in standard position and solve for missing angles. There are 15 questions.
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Interactive
Curated OER

Basic Geometry Vocabulary

For Students 10th
For this geometry worksheet, 10th graders match basic vocabulary words relating to angles, circles, quadrilaterals, and transformations in a drag and drop game format.  The one page interactive worksheet contains twenty matching...
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Worksheet
Curated OER

Trigonometry Worksheet: Double Angle Formula (1)

For Students 11th - 12th
Students use the double angle formula to solve one problem. They are given the problem: if sin(a)=3/5, and a is an acute angle, use the double angle formula to find exact values of given sin, cosign, and tangent within the quadrant of...
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Unit Plan
Mathematics Vision Project

Geometric Figures

For Teachers 10th - 12th Standards
Logical thinking is at the forefront of this jam-packed lesson, with young mathematicians not only investigating geometric concepts but also how they "know what they know". Through each activity and worksheet, learners wrestle with...
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Assessment
Inside Mathematics

Rhombuses

For Teachers 9th - 12th Standards
Just what does it take to show two rhombuses are similar? The assessment task asks pupils to develop an argument to show that given quadrilaterals are rhombuses. Class members also use their knowledge of similar triangles to show two...
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Lesson Plan
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NASA

It All Comes Full Circle

For Teachers 9th - 12th Standards
How long does it take spacecraft go around the earth? Using the circular orbits of the space shuttle and the International Space Station, groups determine the distance traveled in one revolution, then calculate the distance traveled...
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Lesson Plan
Illustrative Mathematics

Regular Tessellations of the Plane

For Teachers 9th - 11th Standards
Bringing together the young artists and the young organizers in your class, this lesson takes that popular topic of tessellations and gives it algebraic roots. After covering a few basic properties and definitions, learners attack the...
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Lesson Plan
EngageNY

Applications of Congruence in Terms of Rigid Motions

For Students 9th - 10th Standards
Corresponding parts, congruent parts, congruent corresponding parts—what does it all mean? The resource challenges pupils to identify corresponding parts for pairs of figures. It uses examples of figures that undergo rigid...
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Printables
Chapman University

A Pythagorean-Style Proof of the Sine Sum-of-Angles Formula

For Teachers 10th - 12th
This well organized poster shows a step-by-step algebraic proof and related graphic. Understanding how formulas were derived, connects learners to the idea that the study of mathematics is continuous and cumulative. Learners will also...
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Worksheet
Curated OER

Triangles

For Students 10th
In this triangles worksheet, 10th graders solve 12 different problems that include various angles of triangles. First, they determine the measure of an exterior angle. Then, students determine the measure of any of the base angles of an...
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Worksheet
Curated OER

Triangles

For Students 6th - 10th
In this triangles worksheet, students solve six word problems where they determine the angles measures in different triangles.
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Worksheet
Curated OER

Polygon Sum Conjecture

For Students 10th
In this geometry worksheet, 10th graders identify the missing angles using the polygons sum conjecture. They measure exterior and interior angles using their angle theorems. There are 63 problems.
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Lesson Plan
Curated OER

The Ambiguous Case

For Teachers 9th - 10th
Students investigate the relationship of triangles with its sides and angles. In this geometry lesson, students create visual on the graphing navigator as they study triangles. They move the sides around to create different angle-side...
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Interactive
Curated OER

All About Quadrilaterals

For Students 7th
In this quadrilateral post test activity, 7th graders answer ten multiple choice questions by solving questions based on quadrilaterals and angles of quadrilaterals. This is an interactive activity.
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Worksheet
Curated OER

Logical Relationship of Postulates & Theorems

For Students 10th - 12th
In this postulates and theorems worksheet, students explore a concept map containing information about angles and sides, alternate interior angles, and diagonals of a parallelogram.  They use the concept map to prove theorems dealing...
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Lesson Plan
Curated OER

Bouncing off the Wall

For Teachers 3rd - 6th
Students watch a video clips before problem solving the use of angles in real world situations. They problem solve using spatial reasoning while connecting math to a sports activity that investigates the path of a bouncing ball.
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Worksheet
Curated OER

Stairs and Slope

For Students 11th
In this stairs and slope worksheet, 11th graders solve and complete 12 various problems that include identifying stairs that meet the given guidelines using slope. First, they use a ruler to measure the risers and treads from one set of...
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Worksheet
Curated OER

Trigonometric Triangles

For Students 9th - 11th
In this trigonometry learning exercise, students find the missing angle and sides given the 6 trigonometric values. There are 6 questions with an answer key.
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Worksheet
Curated OER

Leveled Problem Solving: Circle Graphs

For Students 6th - 9th
In this circle graphs worksheet, learners solve 6 word problems based on a circle graph about the most popular classes for sixth graders. Students calculate angle measures of circles for 2 of the problems.
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Worksheet
Curated OER

The Radian Walk

For Students 10th - 12th
Students play a game to learn angle measures in radians. In this precalculus/trigonometry activity, students play a game similar to a cake walk. When the music stops, which ever student is selected, names his/her coordinates and place on...
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Lesson Plan
Curated OER

Special Segments in a Triangle

For Teachers 10th
For this geometry worksheet, 10th graders review the vocabulary associated with the special segments of a triangle and the associated points of concurrency and solve problems in which they find the indicated missing angle or segment. ...

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