# Thread: [ASK] How to Read A'?

1. ## [ASK] How to Read A'?

If an ABC triangle is transformed, the result will be triangle A'B'C'. In my country, A' is read as "A accent". However, when I saw this transformation video (Video: Transformations - Translation, Reflection, Dilation, and Rotation | Educational Video | WatchKnowLearn Educational Videos | WatchKnowLearn), they seem to pronounce A' as "A prime", "A point", "A prune", "A plum", whichever was right since I suck at English-listening. So, can you people tell me what exactly do they say how to pronounce A'?

2. ## Re: [ASK] How to Read A'?

Originally Posted by Monoxdifly
If an ABC triangle is transformed, the result will be triangle A'B'C'. In my country, A' is read as "A accent". However, when I saw this transformation video (Video: Transformations - Translation, Reflection, Dilation, and Rotation | Educational Video | WatchKnowLearn Educational Videos | WatchKnowLearn), they seem to pronounce A' as "A prime", "A point", "A prune", "A plum", whichever was right since I suck at English-listening. So, can you people tell me what exactly do they say how to pronounce A'?
The Three 'C', context. context., & context.
I think anyone who worked in topology or analysis in the last forty years would read "A' or f' " as "A prime or f prime" where "A' " is the set of limit points OR "f' " is the first-derivative of f.