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Mathematics | Grade : 4
Domain - Measurement and Data
Cluster - Geometric measurement: understand concepts of angle and measure angles.
[4.MD.C.5.b] - An angle that turns through n one-degree angles is said to have an angle measure of n degrees.
[AII.F-TF.A.1] -
Understand radian measure of an angle as the length of the arc on the unit circle subtended by the angle.
[MI.G-CO.A.1] -
Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.
[MIII.F-TF.A.1] -
Understand radian measure of an angle as the length of the arc on the unit circle subtended by the angle.