##
#### Display Title

Math Example--Angle Concepts--Angle Measures: Example 17

#### Display Title

# Math Example--Angle Concepts--Angle Measures: Example 17

## Topic

Geometry

## Description

This example features a reflex angle of 255 degrees on a polar coordinate grid. The angle is marked in red and measured clockwise from the 0° line. Students are tasked with identifying the angle, with the solution explaining that it is a reflex angle because its measure is greater than 180 degrees.

As part of a series on angle measures, this example helps reinforce the concept of reflex angles. By presenting angles on a polar coordinate system, students can visualize how angles relate to the coordinate axes and develop a deeper understanding of angle classification.

Repeated exposure to various reflex angles helps students internalize the concept and improves their ability to quickly identify angle types. This repetition is essential for building a strong foundation in geometry.

Teacher Script: "Let's examine this 255-degree angle, class. How does it compare to the previous reflex angles we've studied? Can someone explain why this is classified as a reflex angle? Think about its relationship to a full rotation and how it might be used in practical applications, such as navigation or engineering."

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 |
---|---|

Grade Range | 4 - 8 |

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

Copyright Year | 2013 |

Keywords | angle measure |