Since it is a square, the diagonals are congruent. If a square is split like this, it becomes two congruent right triangles. The relationship between the sides and hypotenuse is a 1:

ratio. So if the diagonal of a square is 14 cm, then the side length would be 14/

, which is approximately 9.899. I don't understand what the answer choices are, but you should be able to square root the numbers to determine the answer.
Answer:
80%
Step-by-step explanation:
out of 20, 1 would be 5%
4 = 20%
100% - 20% = 80%
x-1/3 = 2/7
=>x-0.33 = 0.2857
=>x-0.33+0.33=0.2857+0.33
=>x = 0.6157