Rhode Island Standards
RI.M:G&M:4. NECAP - Grade Level Expectation: Geometry and Measurement.
M:G&M:4:1. Uses properties or attributes of angles (number of angles) or sides (number of sides, length of sides, parallelism, or perpendicularity) to identify, describe, or distinguish among triangles, squares, rectangles, rhombi, trapezoids, hexagons, or octagons; or classify angles relative to 90 degrees as more than, less than, or equal to. (State)