Ohio Mathematics Academic Content Standards (2001)
Geometry and Spatial Sense Standard
Use proportions to express relationships among corresponding parts of similar figures.
Apply properties of equality and proportionality to solve problems involving congruent or similar figures; e.g., create a scale drawing.
Principles and Standards for School Mathematics
Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships
understand relationships among the angles, side lengths, perimeters, areas, and volumes of similar objects;
Apply appropriate techniques, tools, and formulas to determine measurements.
solve problems involving scale factors, using ratio and proportion;