Answer:
The correct answer is option C. 3√5
Step-by-step explanation:
<u>Points to remember</u>
For a right angled triangle
Hypotenuse ² = Base² + Height²
From the attached figure we can see a square and a right angled triangle associated with the square.
Sides of square = 6
<u>To find the value of x</u>
Base = 3 and height = 6
Hypotenuse = x
x² = 3² + 6²
= 9 + 36 = 45
x = √45 = 3√5
Therefore the correct answer is option C. 3√5