Question

what is the grammatical function of the gerund phrase? when you know the length of the base and the height, calculating the area of a triangle is easy. it is a subject. it is an object of a verb. it is an object of a preposition.

Explanation:

To determine the grammatical function of the gerund phrase "calculating the area of a triangle", we analyze the sentence structure. In the sentence "When you know the length of the base and the height, calculating the area of a triangle is easy", the gerund phrase is what the sentence is about (the subject), as it is performing the action of being "easy". The verb "is" links it to the predicate "easy", so it functions as the subject.

Answer:

It is a subject.