Alabama Learning Exchange
Alex: Origami Geometry
Origami (ori-folding, kami-paper) is the traditional Japanese art of folding paper. Students will discover relationships between shapes as they are actively engaged in this hands on geometry lesson to learn basic geometric shapes, their...
Alabama Learning Exchange
Alex: Geometric Man
The learners will explore angles, rays, line segments, perpendicular lines, parallel lines, and two-dimensional figures through the use of the book Shape Up! Fun With Triangles and Other Polygons by David A. Adler. They will also...
Alabama Learning Exchange
Alex: Angle Scavenger Hunt
In this lesson, learners will explore straight, right, acute, and obtuse angles. Students will go on a scavenger hunt throughout the school to search for examples of these types of angles. The learners will use digital cameras to record...
Alabama Learning Exchange
Alex: It's in the Bag
This lesson is a unique and fun way to review perimeter, angles, and types of adjectives. Students pick an object from the classroom that will fit in a paper lunch bag. They investigate their object and fill in the attached sheet. You...
Alabama Learning Exchange
Alex: Angles in the Mix
In this lesson, students explore straight, acute, and obtuse angles in artwork. Then students will use digital cameras to take pictures of objects in their environment that demonstrate these types of angles. Students will use these...
Alabama Learning Exchange
Alex: Build a City on Geometry
The middle schoolers will be split into small, cooperative groups and build a city following specific guidelines. The students will learn how a city is constructed with angles, intersections, parallel, intersecting, and transversal...
ABCya
Ab Cya: Bow and Angle
Join the heroes Loxley, Arrowyn, Busido, and Mockingbird in this epic adventure of Bows and Angles! Practice measuring and reading angles while you defend yourself from treacherous shadow ninjas.
ABCya
Ab Cya: Candy Pool
Ah so close! In this pool game you do not pot the balls but use the cushions to strike matching balls and remove them from the table. Can you master this challenging puzzle game?
Better Lesson
Better Lesson: Finding Angles
The three types of angles, right, acute, and obtuse, exist in our everyday surroundings. Young scholars find these angles using classroom items.
CK-12 Foundation
Ck 12: Geometry: Angles Study Guide
This study guide on angles covers key vocabulary, ways to name angles, how to measure them, the Protractor Postulate and the Angle Addition Postulate, types of angles, congruent angles, angle bisectors, and angle pairs. It is available...
CK-12 Foundation
Ck 12: Geometry: Lines and Angles Study Guide
This study guide on lines and angles covers key terminology; line notation; parallel, perpendicular, and skew lines; and postulates and theorems about lines. It is available for download with free registration.
Scholastic
Scholastic: Study Jams! Math: Geometry: Classify Angles
Watch and learn how to classify angles then test your knowledge.
Khan Academy
Khan Academy: Angle Relationships With Parallel Lines
Find missing angles given two parallel lines and a transversal.
Khan Academy
Khan Academy: Angle Basics
Determine which angle has a greater measure by looking at the size of the opening between the angle's rays.
Khan Academy
Khan Academy: Angle Types
Determine if an angle is acute, right, or obtuse. A protractor is provided.
National Council of Teachers of Mathematics
Nctm: Illuminations: Pi Fight
Become comfortable with using both radians and degrees.
Illustrative Mathematics
Illustrative Mathematics: 4.g Defining Attributes of Rectangles & Parallelograms
At early stages of understanding of geometric shapes, 4th graders describe shapes, but do not yet characterize shapes by their properties. One example of a misconception students have at this stage is that a rectangle has two short sides...
Better Lesson
Better Lesson: Differences With Shapes
Differences between shapes are determined through measurement skills.
Better Lesson
Better Lesson: What Makes a Shape? Analyzing and Script Writing
Third graders will use the bat houses we built as examples of various quadrilaterals.
Shodor Education Foundation
Shodor Interactivate: Image Tool
Measure angles, distances, and areas in several different images (choices include maps, aerial photos, and others). A scale feature allows the user to set the scale used for measuring distances and areas.
Math Open Reference
Math Open Reference: 30 60 90 Triangle
Learn about the 30-60-90 triangle with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Math Open Reference
Math Open Reference: Radians
Learn about radians with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhance further explanation. Includes links to related topics.
Calculator Soup
Calculator Soup: Angle Conversion Calculator
Convert units of angles by entering the value to convert and the from and to units.
Geometry Help
Geometry Help: Arcs, Angles, and Sectors
Explains the basic concept of arcs, angles, and sectors with step-by-step instructions and methods for solving specific problems on your own relating to this topic.