Missouri Learning Standards
MO.4.GM. Geometry and Measurement
4.GM.A. Classify 2-dimensional shapes by properties of their lines and angles.
4.GM.A.1. Draw and identify points, lines, line segments, rays, angles, perpendicular lines and parallel lines.
4.GM.B. Understand the concepts of angle and measure angles.
4.GM.B.4. Identify and estimate angles and their measure.
4.GM.B.5. Draw and measure angles in whole-number degrees using a protractor.