The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct missing length to the nearest hundredth. A calculator may be helpful.

a = ?, b = 13, c = 21

Question

The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct missing length to the nearest hundredth. A calculator may be helpful.

a = ?, b = 13, c = 21

jjuden · Answer

a 15.83
      b 15.87
      c 16.19
      d 16.49

anonymous · Answer

a^2+b^2=c^2 so...
a^2+13^2=21^2
a^2+169=441
a^2=441-169
a^2=272
a=sqrt(272)
a=16.49

mathmale · Answer

Please invest some effort into finding a solution.  You might draw this triangle, along with the known side lengths, and then determine how you'd find the missing side.

anonymous · Answer

|dw:1394171372883:dw|           $$\sqrt{13^2+21^2}$$

anonymous · Answer

That will = A

jjuden · Answer

@nohegarcia thank you for showing the steps i kinda understand now