Question

1. what is the same as writing that \angles 5 and 6 are supplementary adjacent angles\?

angles 5 and 6 are not next to each other and sum up to 180°.
angles 5 and 6 are next to each other and sum up to 90°.
angles 5 and 6 are next to each other and sum up to 180°.
angles 5 and 6 are not next to each other and sum up to 90°.

Explanation:

Supplementary adjacent angles (linear pair) are adjacent (next to each other) and their sum is \(180^\circ\). Complementary angles sum to \(90^\circ\). So "Angles 5 and 6 are supplementary adjacent angles" means they are next to each other and sum to \(180^\circ\).

Answer:

Angles 5 and 6 are next to each other and sum up to \(180^\circ\).