Let's solve the questions shown in the image.

1. Circle the correct answer for each question:

a) $\sqrt{9}$
$\sqrt{9} = 3$
So, the correct answer is 3.

b) $16^2$ $16^2 = 256$
The correct answer is 256.

c) $\sqrt{100}$ $\sqrt{100} = 10$
The correct answer is 10.

d) $\sqrt{36}$ $\sqrt{36} = 6$
The correct answer is 6.

e) $25^2$ $25^2 = 625$
The correct answer is 625.

2. The area, $A$, of a square is given. Find the side length of the square.

The area of a square is calculated as $A = s^2$, where $s$ is the side length. We need to find $s$ for each given area:

a) $A = 50 \, \text{cm}^2$
$s = \sqrt{50} \approx 7.07 \, \text{cm}$

b) $A = 8 \, \text{mm}^2$
$s = \sqrt{8} \approx 2.83 \, \text{mm}$

c) $A = 169 \, \text{cm}^2$
$s = \sqrt{169} = 13 \, \text{cm}$

Would you like further details on any of these solutions?

5 Related Questions:

1. How do you calculate the square root of a number?
2. What is the formula for the area of a square?
3. Can a square have negative side lengths?
4. What are the units of area and how do they relate to side lengths?
5. How can the square root of non-perfect squares be estimated?

Tip: For any square's area, the side length is always the square root of the area.