Question

Select the correct answer from each drop-down menu.

13
15
12
B
D
ABCD is a square.
The length of each side of the square ABCD is 9 units, and the length of its diagonal is about
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✓units

Answer 1

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Answer:
`\textsf{Option A, 13}`

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Given:
`\textsf{Side length = 9 units}`

Find:
`\textsf{Diagonal length}`

Solution: The diagonal length can be easily determined using an equation which uses the side length of a square multiplied by the square root of 2. All we need to do is plug in the values and simplify the expression.

Plug in the values

• 
  `\textsf{Diagonal = Side length} * √(2)`

• 
  `\textsf{Diagonal = 9 units} * √(2)`

Simplify the expression

• 
  `\textsf{Diagonal = 9 units * 1.4142}`

• 
  `\textsf{Diagonal = 12.73 units}`

Looking at the answer options that have been provided, the option that best fits our scenario is option A, 13.