Question

change the voice of following the story was written by my mother​

Answer 1

Answer:

three angles

If a triangle is neither isosceles nor right, we will call it a generic triangle. A piece of trivia that is true for all triangles: The sum of the three angles of any triangle is equal to 180 degrees.

Answer 2

Answer:

My mother wrote the story.

Explanation:

"The story was written by my mother" is in a passive voice (Object + was/were + Verb 3 + by + Subject) of Simple past Tense (Subject + Verb 2 + Object).