IL.9. Geometry: Use geometric methods to analyze, categorize and draw conclusions about points, lines, planes and space.
9.A. Demonstrate and apply geometric concepts involving points, lines, planes and space.
9.A.2b. Identify and describe how geometric figures are used in practical settings (e.g., construction, art, advertising).
9.B. Identify, describe, classify and compare relationships using points, lines, planes and solids.
9.B.2. Compare geometric figures and determine their properties including parallel, perpendicular, similar, congruent and line symmetry.
9.C. Construct convincing arguments and proofs to solve problems.
9.C.2. Formulate logical arguments about geometric figures and patterns and communicate reasoning.