Directions: Choose the correct synonym for the key word.

Apex

Apex refers to the highest point, tip, or peak of something, such as a mountain, triangle, or pyramid. 'Peak' is the correct synonym as it also means the top or highest point. 'Barbarous' means uncivilized, 'Repel' means to drive away, and 'Inert' means lacking the ability to move - none are related to apex. The term is commonly used in geometry, biology, and general contexts.