Answer:
The value of x is 5 centimeters.
Therefore, option 3 is correct.
Explanation:
A triangle has three sides 3,x and 4 cms
Since the triangle is right angle triangle so, it will follow the Pythagoras theorem:
(1)
We have been given three sides x,3 and 4
On substituting the values in (1) we get:


Hence, the value of x is 5 centimeters.
Therefore, option 3 is correct.
Please look at the attachment for the figure.