What do you call two rays that, if extended indefinitely, would never cross?

• A. Line
• B. Parallel Rays
• C. Endpoint
• D. Isosceles Triangle

Answer: (B)

Rays that never cross when extended share the same direction and lie in the same plane without meeting. That situation is called parallel rays: they run side by side and stay at a constant distance apart as they go on forever. The other terms don’t describe this idea — a line would extend in both directions from a point, an endpoint is just the starting point of a ray, and an isosceles triangle is a different shape with two equal sides. So the description fits parallel rays because they extend indefinitely without ever intersecting.