Access Point #: MAFS.4.MD.3.AP.5a (Archived Access Point)


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Identify an angle in a two-dimensional figure.

Clarifications:

Essential Understandings

Concrete:

  • Use two-dimensional (2-D) manipulatives, such as pattern blocks and attribute shapes, to identify angles.
Representation:
  • Use a visual representation of a two-dimensional (2-D) shape to identify angles.
  • Understand the following concepts, symbols, and vocabulary: angle and degree.

Number: MAFS.4.MD.3.AP.5a Category: Access Points
Cluster: Geometric measurement: understand concepts of angle and measure angles. (Additional Cluster) : 

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Related Standards

Name Description
MAFS.4.MD.3.5: Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement:
  1. An angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a “one-degree angle,” and can be used to measure angles.
  2. An angle that turns through n one-degree angles is said to have an angle measure of n degrees.



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