Grade 4 · Geometry

CCSS.MATH.CONTENT.4.G.A.1

Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

Read this standard on the official Common Core site

Lessons that teach this standard

• Angles: Naming, Measuring and Adding

  What an angle is, why a degree is a fraction of a full turn, how to name angles as acute, right or obtuse, and why angle measures add when angles sit side by side.