Question 1194280
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You mentioned that PQR=21cm, but that doesn't make any sense.


Because three letters are involved, PQR seems to either refer to an angle, or a triangle. Neither of which would make sense to attach "21 cm" to it. 


Did you mean to say something like PQ = 21? Or something similar to it? 


Please let me know, or revise and make a new post. Thank you.
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