The side lengths of a square are 7 in. What is the length of the diagonal?

Question 13 options:

7

14

72√

73√

Question

The side lengths of a square are 7 in. What is the length of the diagonal?

Question 13 options:
	
7

	
14

	
72√
	
73√

anonymous · Answer

length of the diagonal = sqrt(2) * side of square

anonymous · Answer

this isnt the answer

anonymous · Answer

some problem with the third and fourth option given
answer should be
$$7\sqrt{2}$$

anonymous · Answer

@jhonyy9
it is a diagonal of a  cube. Isn't it?

jhonyy9 · Answer

yes so than ?

anonymous · Answer

is it relevant to mention cube here?

jhonyy9 · Answer

so this is clearly sure that every sides are the same equale but for yo can calculi the diagonale of the square you need calculi first of all one diagonal of a side 

yes ?

anonymous · Answer

@jhonyy9  You are a champion . I assume you know better method than mine. So go for it, mate

anonymous · Answer

|dw:1402339080468:dw|
square ABCD
property of square - 1) sides of square are equal in length
2) all sides are perpendicular to each other
i used pythagoras theorem to determine the length of diagonal of a square
BD^2 = (7)^2 + (7)^2
BD = sqrt(2*49)
     = 7 sqrt(2)
PS- square is a 2-dimensional figure and cube is 3-dimensional figure