Texas Instruments
Traditional Copy an Angle - Compass Construction Using Cabri Jr.
Learnerss explore geometric construction in this geometry instructional activity. They will investigate the traditional construction for copying an angle using Cabri Jr. in lieu of paper and pencil construction. The instructional...
Curated OER
Altitude, Median, and Angle Bisector of a Triangle
Learners investigate the special properties of an altitude, a median, and an angle bisector and explore how these special segments divide the area of a triangle. The dynamic nature of Cabri Jr. allows pupils to form and verify conjectures.
Curated OER
Perpendicular and Angle Bisectors
In this geometry worksheet, 10th graders solve problems that are based on the theorems associated with perpendicular and angle bisectors of a triangle. An application on the coordinate plane is included. The one page worksheet contains...
Texas Instruments
Copying an Angle
High schoolers will investigate geometric construction in this geometry lesson. Your pupils can explore the basic construction of copying an angle, using the constructions tools of Cabri Jr.
Physics LAB
Work and Energy Practice: Forces at Angles
In this work and energy learning exercise, students answer 9 questions about 6 diagrams showing forces at angles. Students find the work done on the objects, the power supplied by the forces, and they find the angle theta in the diagrams...
Curated OER
Linear Equations and Angles
For this geometry worksheet, students identify the length of the different sides using equations. They solve for the unknown to identify similarity and congruence in angles and sides. There are 22 questions.
Curated OER
Angle Comparison to Right Angles
In this angles worksheet, students solve 4 problems in which an angle is analyzed and measured. Students tell if each angle is greater than, less than or equal to a right angle.
Curated OER
Classify and Measure the Angles
In this measuring angles worksheet, students use protractors to measure 9 angles and classify them as obtuse, straight, acute or right angles.
Curated OER
Calculate the missing central angles
In this angles worksheet, students calculate the missing central angles in the circle shown. Students complete 4 calculation problems.
Curated OER
Classify and Measure Angles
In this angles worksheet, students use a protractor to measure and classify a set of 9 angles. A reference web site is given for additional activities.
Curated OER
Measure Angles: Greater Less Than or Equal To?
In this measuring angles worksheet, students determine whether given angles or more than, less than or equal to 90 degrees. 
Curated OER
Naming the Vertex and Sides for Eight Angles
In this angles worksheet, learners name the vertex and sides formed by the angles. The solutions are provided.
Curated OER
Complementary Angles
In this complementary angles worksheet, students match each given angle with its complement. There are 8 problems on the page.
Curated OER
Measuring Angles Worksheets
In this angles worksheet, students measure the angles in the protractors on the worksheet. Students complete 6 problems total on this worksheet.
Curated OER
Angles
For this angles worksheet, students classify and measure a set of 12 angles. An answer key is included A website reference is given for additional resources.
Curated OER
Angles
In this angles worksheet, students classify and measure a set of 12 angles. A website reference for additional activities is given.
McGraw Hill
Triangles
After reviewing characteristics of seven types of triangles, young geometers discover how to find the missing angle of a triangle. Then, they practice identifying triangles, find missing angles, and find missing side lengths of similar...
EngageNY
One-Step Problems in the Real World
Mirror, mirror on the wall, which is the fairest resource of them all? Individuals write and solve one-step equations for problems about angle measurement, including those involving mirrors. Both mathematical and real-world problems are...
West Contra Costa Unified School District
Parallel Lines Cut by a Transversal
Parallel lines seem so right for each other. It's too bad they'll never, ever meet. Learners use tracing paper to discover relationships among angles formed by two parallel lines cut by a transversal. They apply this information to find...
Illustrative Mathematics
Right Triangles Inscribed in Circles I
One of the basic properties of inscribed angles gets a triangle proof treatment in a short but detailed exercise. Leading directions take the learner through identifying characteristics of a circle and how they relate to angles and...
EngageNY
Rotations
Searching for a detailed lesson to assist in describing rotations while keeping the class attentive? Individuals manipulate rotations in this application-based lesson depending on each parameter. They construct models depending on the...
Willow Tree
Ratios and Proportions with Congruent and Similar Polygons
Investigate how similar and congruent figures compare. Learners understand congruent figures have congruent sides and angles, but similar figures only have congruent angles — their sides are proportional. After learning the...
Alabama Learning Exchange
"I Saw the Sine"
Discover trigonometric ratios that complement each other. Using two videos, the lesson introduces the trigonometric ratios. The class discovers the relationship between the sine and cosine of complementary angles.
CCSS Math Activities
Smarter Balanced Sample Items: 7th Grade Math – Target F
Sometimes it's how you ask the question that counts. The sixth installment of nine from the Smarter Balanced Claim 1 Slideshow series presents a set of 13 questions to assess understanding of angle relationships as well as area and...
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