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The perimeter of a square is 56 cm. What is the approximate length of its diagonal ? 10.6 cm 14.0 cm15.0 cm18.8 cm

Sagot :

We are given the perimeter of a square. Since a square has all of the sides of the same length the perimeter is, therefore:

[tex]P=4l[/tex]

Where "l" is the length of the side. Solving for "l" by dividing both sides by 4:

[tex]\frac{P}{4}=l[/tex]

Replacing the value of "P":

[tex]\frac{56}{4}=l[/tex]

Solving the operations:

[tex]l=14[/tex]

The length of the diagonal of a square is given by:

[tex]d=l\sqrt[]{2}[/tex]

Replacing the value of the length we get:

[tex]d=14\sqrt[]{2}[/tex]

Solving the operation:

[tex]d=19.8[/tex]

Therefore, the length of the diagonal is 19.8 cm.