Ingrid is making a quilt using squares that measure 5 in. on a side. What is the length of a diagonal of one of the quilt squares? Round to the nearest tenth.

Question

anonymous · Answer

well from what i interpret is that its a square and you want to find the diagonal, which would look a bit like this; |dw:1336761685489:dw|  so i think too solve it we use the Pythagorean theorem, which is a^2 + b^2 = c, where c is the hypotenuse which is the diagonal, and a and b are the sides. 
5^2 + 5^2 = c^2
25 + 25 = c^2
50 = c^2
c^2 = 50
c = *sqrt(50
c = 5*sqrt(2 
but since it says to round to the nearest tenth, using the calculator we find out the decimal number for it which is 7.0710; we round it and it ends up as 7.1