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/Home/Mathematics/Geometry/Angles Angles and angle terms Votes:0 Angles and angle terms What is an angle? Degrees: measuring angles Acute angles Obtuse angles Right angles Complementary angles Supplementary angles Vertical angles Alternate interior angles Alternate exterior angles Corresponding angles Angle bisector Perpendicular lines Math Contests School League Competitions Contest Problem Books Challenging, fun math practice Educational Software Comprehensive Learning Tools Visit the Math League What is an Angle? Two rays that share the same endpoint form an angle. The point where the rays intersect is called the vertex of the angle. The two rays are called the sides of the angle. Example: Here are some examples of angles. We can specify an angle by using a point on each ray and the vertex. The angle below may be specified as angle ABC or as angle CB Read More Go to Site Building Blocks - Classifying angles - First Glance Votes:0 Home | Teacher | Parents | Glossary | About Us Email this page to a friend --> © 2000-2005 Math.com. All rights reserved . Please read our Privacy Policy . The diagrams show the four main types of angles that we work with in geometry: straight angle , right angle , acute angle , and obtuse angle . We use a protractor to measure an angle in degrees . Click on each angle to measure it. Homework Help | Geometry | Geometry Building Blocks Email this page to a friend Search Enter your search terms Web Math.com Submit search form Play Sudoku · Words · Coordinate geometry · Pairs of lines · Classifying angles · Angles and intersecting lines · Circles First Glance In Depth Examples Workout Classifying angles Read More Go to Site Hamilton - Math To Build On: Angles Votes:0 Angles About Math To Build On || Contents || On to Crossing & Parallel Lines || Glossary Angles Angle is an important term in the trades and has many definitions; however, three definitions cover most of the knowledge we need: (1) The shape made by two straight lines meeting in a point. (2) The space between those lines. (3) The amount of space measured in degrees. (4) The vertex is the point where the two straight lines come together to form the angle. Angle Names Names are given to angles with certain characteristics: (5) A zero degree angle has no space between the two lines. (6) An acute angle is any angle between 0&#176 and 90&#176 . (7) A right angle is a 90&#176 angle. The two lines that form a 90&#176 angle are perpendicular to each other. Notice that the angle symbol is in the sha Read More Go to Site The Math Forum - Shapiro, Find the Sum of the Angles Votes:0 Geometry Through Art Norman Shapiro Find the Sum of the Angles What Children Can Learn About Art and Geometry Table of Contents || How to Request Materials GIVEN: The sum of the angles of a triangle = 180&#176 . The sum of the angles of the vertices at the center of a circle = 360&#176 . FIND: The angles of all the vertices in each circle design. If you have the Geometer's Sketchpad , here's a sketch to print out (108K). On to Hidden Shapes in the Grid [ Privacy Policy ] [ Terms of Use ] Home || The Math Library || Quick Reference || Search || Help © 1994-2007 Drexel University. All rights reserved. http://mathforum.org/ The Math Forum is a research and educational enterprise of the Drexel School of Education . Norman Shapiro P.O. Box 205 Long Beach, NY 11561 Web page design by Sarah Seast Read More Go to Site Types of Triangles based on Angles Votes:0 Types of Triangles based on Angles Learn Practice Play Explore Feedback Previous Lesson Table of Contents Next Lesson &nbsp Identifying Types of Triangles by Angles Types of triangles based on their angles A RIGHT triangle has one 90 o angle. An OBTUSE triangle has one angle that is greater than 90 o . An ACUTE triangle has all three angles less than 90 o . Return to Top What type of Triangle is it? You have correct and incorrect. This is percent correct Return to Top Play Game What is it? Best Score How many correct answers can you get in 60 seconds? Extra time is awarded for each correct answer. Play longer by getting more correct. How fast can you get 20 more correct answers than wrong answers? Games, Puzzles and Riddles Return to Top &nbsp Explore Cool !!! Free Things Homework Help Sof Read More Go to Site

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