Ohio Mathematics Academic Content Standards (2001)
Use problem solving techniques and technology as needed to solve problems involving length, weight, perimeter, area, volume, time and temperature.
Use proportional reasoning and apply indirect measurement techniques, including right triangle trigonometry and properties of similar triangles, to solve problems involving measurements and rates.
Grade Level Indicators (Grade 7)
Solve problems involving proportional relationships and scale factors; e.g., scale models that require unit conversions within the same measurement system.
Grade Level Indicators (Grade 9)
Use scale drawings and right triangle trigonometry to solve problems that include unknown distances and angle measures.
Principles and Standards for School Mathematics
Apply appropriate techniques, tools, and formulas to determine measurements.
solve problems involving scale factors, using ratio and proportion;