I have to determine the unknown length of a right triangke to the nearest tenth of a unit. One side is 7m and the base is 10m. I got a friend to do this and age came up with 7.1m as the answer. When I do the steps I get the answer 12.21. I believe my friend is right but need help with the steps on how to figure this out. Thank you!

Question

I have to determine the unknown length of a right triangke to the nearest tenth of a unit.  One side is 7m and the base is 10m.  I got a friend to do this and age came up with 7.1m as the answer.  When I do the steps I get the answer 12.21.  I believe my friend is right but need help with the steps on how to figure this out.  Thank you!

Ms. Sue · Answer

Pythagorean Theorem a^2 + b^2 = c^2 7^2 + 10^2 = c^2 49 + 100 = c^2 149 = c^2 12.21 = c

PsyDAG · Answer

Pythagorean theorem side^2 + side^2 = hypotenuse^2 7^2 + 10^2 = 49 + 100 = 149 I would agree with you.