Please help, fan and medal!! A square television screen has a side length of 10 inches. What is the approximate length of the diagonal of the television screen?
A:10
B:14
C:20
D:100

Question

Please help, fan and medal!! A square television screen has a side length of 10 inches. What is the approximate length of the diagonal of the television screen?
A:10
B:14
C:20
D:100

anonymous · Answer

I keep getting 1.41 as my answer :/

anonymous · Answer

The diagonal of a square is found using the Pythagorean theorem. That means your answer is $$\sqrt{10^{2} + 10^{2}}$$, which equals 14.14. So 14 is your answer.

anonymous · Answer

Your decimal was just in the wrong place(:

anonymous · Answer

Ohh lol!! Thank you so much!!

anonymous · Answer

Yep! Just so you know, you use the Pythagorean theorem because a square is made up of 2 identical right triangles; that means the diagonal is the hypotenuse of both of those triangles.

anonymous · Answer

Now I see where I messed up! :D

anonymous · Answer

Haha good!