This unit is an introduction to angles and angle measurement. Students start this unit drawing points, lines, segments, rays and angles since it is foundational to the other standards in this unit. Students use their understanding of equal partitioning and unit measurement to understand angle and turn measure.
Unitataglance
Key concept: Points, lines, line segments, and rays have specific properties that are maintained when combined to make geometric figures. One of these new figures, an angle, is a geometric figure that is created wherever two rays share a common endpoint. 
Key concept: An angle is measured in reference to two rays that intersect the center point of a circle. An angle that turns through 1/360th of a circle is called a onedegree angle. 
Key concept: An angle that turns through n onedegree angles is said to have a measure of n degrees. 


Suggested pacing 
Days 13 
Days 46 
Days 710 
Suggested class plan 



Additional unit information
Prior Knowledge Needed:
 We can use two and threedimensional shapes to compose a composite shape. (Grade 1, Unit 12)
 Based on the definition of a fraction a/b as a parts that are the size of 1/b, we can construct a whole given any fractional part of that whole. (Grade 4, Unit 4)
Units on the Horizon:

Recognizing and analyzing attributes of 2dimensional shapes (Grade 4, Unit 13)