Question

with the help of pythagorean triplet find the other two numbers whose one number is 7​

Answer 1

Perhaps you are asking: is there a Pythagorean triple in which one of the numbers is 7? If so, the answer is yes: 7, 24, 25 is such a triple. I will leave it to you to check that [math]7^{2} + 24^{2} = 25^{2}[/math].