SOLUTION: a)if (9,b,15) is a Pythagorean tripe, then b=? b)the principal square root of 625 equals _______

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: a)if (9,b,15) is a Pythagorean tripe, then b=? b)the principal square root of 625 equals _______       Log On


   

Question 281253: a)if (9,b,15) is a Pythagorean tripe, then b=?
b)the principal square root of 625 equals _______
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
a%5E2+%2B+b%5E2+=+c%5E2
9%5E2+%2B+b%5E2+=+15%5E2
81+%2B+b%5E2+=+225
b%5E2+=+144
b=12
9,12,15 is in the ration 3,4,5 whicah are always right triangles
sqrt%28625%29+=+25+or+-25
principle sqrt = 25 (the positive one)