IL.7. Estimation and Measurement: Estimate, make and use measurements of objects, quantities and relationships and determine acceptable levels of accuracy.
7.A. Measure and compare quantities using appropriate units, instruments and methods.
7.A.3b. Apply the concepts and attributes of length, capacity, weight/mass, perimeter, area, volume, time, temperature and angle measures in practical situations.
7.C. Select and use appropriate technology, instruments and formulas to solve problems, interpret results and communicate findings.
7.C.3b. Use concrete and graphic models and appropriate formulas to find perimeters, areas, surface areas and volumes of two- and three-dimensional regions.
IL.9. Geometry: Use geometric methods to analyze, categorize and draw conclusions about points, lines, planes and space.
9.C. Construct convincing arguments and proofs to solve problems.
9.C.3b. Develop and solve problems using geometric relationships and models, with and without the use of technology.