# SOLUTION: What is the length of the blue line labeled r in the image below? Give your answer in terms of a and b. blue line labeled r starting at the orgin and ending at a point a,b T

Algebra ->  Algebra  -> Surface-area -> SOLUTION: What is the length of the blue line labeled r in the image below? Give your answer in terms of a and b. blue line labeled r starting at the orgin and ending at a point a,b T      Log On

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 Geometry: Area and Surface Area Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Surface-area Question 433343: What is the length of the blue line labeled r in the image below? Give your answer in terms of a and b. blue line labeled r starting at the orgin and ending at a point a,b Then I come up with the answer r = sqrt(a^2 + b^2), but it always says Check the syntax of your response. I have changed many times, but hopeless. Please help!!!!Answer by richard1234(5390)   (Show Source): You can put this solution on YOUR website!By the Pythagorean theorem, . If you are trying to enter it on an online class/test, you might want to try sqrt(a^2 + b^2) Sqrt[a^2 + b^2] if you are using Wolfram Mathematica (or similar) software $\sqrt{a^2 + b^2}$ if you are using LaTeX If it doesn't accept any of these formats, you might want to look into your online software's manual on how to input such expressions.