Question

A square has side lengths of 9, which of the following is a correct formula for finding the area of a square? Select all that apply.

A=9^2
A=Ï€(9^2)
A= 9 . 9
A= 1/2 (9) (9+9)
A= 1/2 (9) (9)

Answer 1

So, the formula for finding area for a square is base x height or x^2.

The correct way of finding it is, A= 9^2 and
A= 9 • 9 but you also get the area with
A= 1/2 (9) (9+9).

Answer 2

A.
`A=9^2`

C.
`A=9\cdot 9`

D.
`A=(1)/(2)(9)(9+9)`

Explanation:

We have been given that a square has side lengths of 9. We are asked to choose the correct options that represent area of the given square.

We know that area of a square is square of its each side.

`\text{Area of square}=a^2`, where a represents each side of the square.

Upon looking at our given choices, we can see that option A is the correct choice as our given square has length of 9 and square of 9 is correct.

We can write area formula as:

`\text{Area of square}=a\cdot a`

`\text{Area of square}=9\cdot 9`

Therefore, option C is correct choice as well.

Upon simplifying option D, we will get:

`A=(1)/(2)(9)(9+9)`

`A=(1)/(2)(9)(18)`

`A=9*9`

Therefore, option D is correct choice as well.

Upon simplifying option E, we will get:

`A=(1)/(2)(9)(9)`

`A=(4.5)(9)`

Therefore, option E is not a correct choice.