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 Mar5 revised How to work RSA encryption/decryption added 455 characters in body Mar5 comment How to work RSA encryption/decryption I do have my encryption and decryption keys worked out. The problem is the how of encryption and then decryption the message input, I mean the algorithm for encryption 1 character at a time and then decryption to yield each character at a time. Mar5 asked How to work RSA encryption/decryption Mar5 accepted Trying to calculate RSA decryption key Mar5 comment Trying to calculate RSA decryption key thanks for the tip. Mar5 awarded Commentator Mar5 comment Trying to calculate RSA decryption key Here is the problem, when I put my Cipher through the same, I don't get the original back. $$106994^70643 (mod 239593)$$ in Wolfram also gives me $$152989$$, which is incorrect Mar5 revised Trying to calculate RSA decryption key added 96 characters in body Mar5 awarded Editor Mar5 comment Trying to calculate RSA decryption key oops! I corrected that. Yes, it is and I get d=70643. Mar5 revised Trying to calculate RSA decryption key added 1 characters in body Mar5 asked Trying to calculate RSA decryption key Mar2 comment Calculating the area of an irregular polygon @joriki, I am writing a program to do this(not much of a mathematician yet) but I hope that by coding some of the problems i have picked, I can get a better idea of what is out there. So, far, I have a solution for polygons <=4. I need a better explaination please of your Newton idea, since all I know is that I need to find R before I can find Area. Mar2 comment Calculating the area of an irregular polygon Thanks. I did go ahead and implement the Brahmgupta solution to handle 3/4 sided polygons, but I still would prefer a solution that handles all edge counts. Mar2 comment Calculating the area of an irregular polygon Thanks. What I was trying to do is figure out a formula for computing R from the first equation you have there in your answer. I figure if I can compute R by using the edges I have, I can then compute Area using the second approach as well. Mar1 comment Calculating the area of an irregular polygon one more silly question . . . where do I get R from? :) Mar1 comment Calculating the area of an irregular polygon I am not certain I follow. I don't know what R is and what does L(k) stand for? Mar1 comment Calculating the area of an irregular polygon Yes, the irregular polygon is cyclic. But I am stuck on how to compute the area of the irregular cyclic polygon or the area of the contained triangles, given that for each of the (n-2) triangles in my polygon, I am only aware of the length of just two sides. Mar1 awarded Student Mar1 asked Calculating the area of an irregular polygon