🔍 Key Concepts

• Scale rulers used in drafting and drawing (who uses which type) • Difference between metric, engineers, and architects scales • How the ratio markings like 1/2" = 1 ft and 1/4" = 1 ft are typically used

💭 Think About

• Look closely at the labels on the ruler: what units are shown, and what does each marking (like 1/2" = 1 ft) tell you about the purpose of this scale? • Which profession commonly works with building plans drawn in inches on paper that represent feet in real life? • Eliminate the options that clearly do not match the units or the size of objects this scale would be used to measure.

✅ Before You Answer

• Confirm whether the ruler uses metric units (mm, cm, m) or inches and feet. • Check if the numbers look like decimal feet per inch (e.g., 10, 20, 30) or fractions of an inch = 1 foot (e.g., 1/4" = 1 ft). • Ask yourself which choice would be used for building or layout drawings versus mechanical parts or tiny thickness measurements.