Big Ideas Math Integrated I, 2016
BI
Big Ideas Math Integrated I, 2016 View details
1. Points, Lines, and Planes
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Exercise 16 Page 384

Opposite rays must share endpoint. Therefore, rays with different endpoints cannot be opposite.

Example Solution: AC and ED

Practice makes perfect

Opposite rays always share the same endpoint. For us to find two rays that are not opposite, it is enough to find two rays that do not share endpoints. For our first ray we can arbitrarily choose AC.

Let's now name any ray with an endpoint other than A, such as ED.

The two rays AC and ED are not opposite. This is just an example solution, so feel free to choose a different pair of rays which do not have the same endpoint!