🔍 Key Concepts

• Great circles vs. small circles on the Earth • Definition of a meridian compared to lines parallel to the equator • How parallels of latitude are classified in navigation and chart work

💭 Think About

• Ask yourself: Which type of line runs east-west, staying the same distance from the equator? • Consider: Are all lines that go completely around the Earth the same type of circle geometrically? • Think about: What is the special property of a great circle compared to other circles drawn on a sphere?

✅ Before You Answer

• Verify which option describes a line that is parallel to the equator (not north-south). • Confirm whether the equator itself is a great circle, and whether lines parallel to it share that same property. • Check that a meridian runs from pole to pole, not parallel to the equator.