Which of the following can be used to describe the rectangle below? A rectangle is shown.

A.
All angles are acute.

B.
Opposite sides are perpendicular.

C.
Opposite sides are parallel.

D.
All sides are the same length.

The answer is: C.

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Step-by-step explanation:

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step-by-step explanatio89

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!