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Whiteboard
ClassFlow

Class Flow: All About Angles

For Teachers 3rd - 5th Standards
[Free Registration/Login Required] This flipchart gives an introduction to angles, reading a protractor, naming and classifying angles. It also includes opportunities to practice these skills. The lesson is aligned with the 5th grade...
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Whiteboard
ClassFlow

Class Flow: Angle Facts

For Teachers 9th - 10th Standards
[Free Registration/Login Required] This lesson is a thorough review of all types of angles (e.g. obtuse, right, scalene, isosceles, equilateral, alternate) with wonderful diagrams to reinforce thinking skills.
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Whiteboard
ClassFlow

Class Flow: Basic Right Triangle Trigonometry

For Teachers 9th - 10th Standards
[Free Registration/Login Required] This flipchart shows the basic relationships between trig functions and the sides and angles of a right triangle.
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Whiteboard
ClassFlow

Class Flow: Bearings

For Teachers 9th - 10th
[Free Registration/Login Required] In this lesson the students select appropriate tools (e.g. compasses and protractors) to measure angles and analyze bearings (N, E, S, and W).
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Whiteboard
ClassFlow

Class Flow: Geometry Line Vote

For Teachers 3rd - 8th Standards
[Free Registration/Login Required] In this lesson the teacher will use geometry and spatial sense to distinguish between point, ray, line, line segment and angle. The students will review vocabulary for these terms and then...
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Whiteboard
ClassFlow

Class Flow: Investigating Regular Polygons

For Teachers 9th - 10th
[Free Registration/Login Required] In this lesson students are introduced to regular polygons. Students learn how to find the drawing angle of any given polygon, exterior angle, interior angle and the sum of the angles for a regular...
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Activity
Math Is Fun

Math Is Fun: Angles on a Straight Line

For Students 3rd - 8th Standards
This very basic website gives a clear, simple explanation of the sum of angles on a straight line that when put together form a straight angle.
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Activity
Math Is Fun

Math Is Fun: Reflex Angle

For Students 3rd - 8th Standards
This math tutorial provides an illustrated explanation of a reflex angle.
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Handout
Math Is Fun

Math Is Fun: Exterior Angle

For Students 3rd - 5th Standards
Gives a clear definition and drawing of an exterior angle of a polygon.
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Activity
University of Cambridge

University of Cambridge: Nrich: Angle A

For Students 3rd - 8th Standards
Sharpen your logic and angle recognition skills by working on this interactive challenge. Solution available.
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Handout
Sonoma State University

Sonoma State University: Angle Bisector

For Students 9th - 10th Standards
This site offers an explanation with words and pictures on how to bisect an angle using a compass and straightedge.
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Handout
Sonoma State University

Sonoma State University: Parallel Lines and Similar and Congruent Triangles

For Students 9th - 10th Standards
This site defines parallel lines, parallel lines cut by a transverse, and congruent triangles. It also contains links for related terms.
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Activity
National Council of Teachers of Mathematics

The Math Forum: Problems Library Geometry Triangles

For Students 9th - 10th Standards
This site contains a wealth of problems that deal with the basic definitions of medians, altitudes, angle bisectors, and perpendicular bisectors or the defining characteristics of the different types of triangles. There are also...
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Interactive
Doina Popovici

Math Play: Classifying Angles Game

For Students 4th - 6th Standards
Play Tic Tac Toe while practicing your skills of identifying an angle as being acute, obtuse, right, or straight in this online game.
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Interactive
Other

Ask Numbers: Measurement Conversion Calculators and Charts

For Students 9th - 10th Standards
What kind of unit conversion would you like to do? This site will allow you to do a multitude of conversions. Just click on the specific measurement you are needing to convert. It also provides a history of measurements and a chart of...
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Handout
University of Georgia

University of Georgia: Inter Math: Angle Bisector

For Students 9th - 10th Standards
This site provides a general definition, complete with a diagram, of an angle bisector.
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Unit Plan
Integrated Publishing

Plane Figures

For Students 9th - 10th Standards
This site describes lines and angles "as found in various plane (flat) geometric figures.".
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Graphic
Math Words

Math words.com: Polar Coordinates

For Students 9th - 10th
This resource provides a basic definition for polar coordinates. Describes the coordinates (r, 0) that are assigned to a point and gives a diagram of a polar coordinate.
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Website
Enchanted Learning

Enchanted Learning: English (Esl) Label Me! Printouts

For Students Pre-K - 1st
Over 100 handouts with answer sheets you can print and use to help build English vocabulary. Numerous topics and themes are covered: everyday words, math terms, seasonal and holiday words, geographical terms, animals, opposites, parts of...
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Graphic
Curated OER

Inter Math Mathematics Dictionary: Angle Bisector

For Students 9th - 10th
This site provides a general definition, complete with a diagram, of an angle bisector.