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Math Example--Angle Concepts--Angle Measures: Example 16

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# Math Example--Angle Concepts--Angle Measures: Example 16

## Topic

Geometry

## Description

This example presents a reflex angle of 240 degrees on a polar coordinate grid. The angle is highlighted in red and measured clockwise from the 0° line. Students are asked to identify the angle shown, with the solution explaining that it is a reflex angle because its measure is greater than 180 degrees.

As part of a comprehensive series on angle measures, this example helps students understand the range of reflex angles. The use of a polar coordinate system allows students to visualize how angles relate to the coordinate axes and reinforces their understanding of angle classification.

Exposure to multiple examples of reflex angles with varying measures reinforces the concept and helps students develop an intuitive understanding of angle classification. This repetition is key to mastering angle identification skills.

Teacher Script: "Now, class, let's look at this 240-degree angle. How does it compare to the other reflex angles we've seen? Can anyone explain why this is still classified as a reflex angle? Think about its relationship to a full rotation and how it might be used in real-world applications."

For a complete collection of math examples related to Angle Measures click on this link: __Math Examples: Angle Measures Collection.__

Common Core Standards | CCSS.MATH.CONTENT.4.G.A.1, CCSS.MATH.CONTENT.7.G.A.2, CCSS.MATH.CONTENT.4.MD.C.5.B, CCSS.MATH.CONTENT.4.MD.C.6, CCSS.MATH.CONTENT.4.MD.C.7 |
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Grade Range | 4 - 8 |

Curriculum Nodes |
Geometry• Angles and Planes• Definition of an Angle |

Copyright Year | 2013 |

Keywords | angle measure |