The characteristic is Temperature
<span>a protostar reaches a temperature high enough for nuclear fusion to begin.</span>
Answer:
Supplementary angles are two angles whose measures add up to 180° .
The two angles of a linear pair , like ∠1 and ∠2 in the figure below, are always supplementary.
But, two angles need not be adjacent to be supplementary. In the next figure, ∠3 and ∠4 are supplementary, because their measures add to 180° .
Explanation:
--- Berry
