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the perimeter of a rectangle is 40 cm and the height of 12 cm what is the width of the rectangle
A.8cm B.10 cm C.12 cm D15 cm​


Sagot :

  • ANSWER

A.8cm

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w=8cm

[tex]P[/tex] Perimeter 40cm

[tex]l[/tex]  Length  12cm

Using the formula

[tex]P=2(l+w)[/tex]

Solving for  [tex]W[/tex]

[tex]w=\frac{P}{2} -l=\frac{40}{2} -12=8cm[/tex]

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HOPE IT HELPS

Answer:

A. 8cm

Step-by-step explanation:

To find easily the width of rectangle use this formula:

  • [tex]\boxed{ \tt \dfrac{P - 2L}{2} = w}[/tex]

Now, calculate the given so we can find the width of the rectangle.

[tex] \tt \: w = \dfrac{P - 2L}{2} \\ \\ \tt \: w = \dfrac{40 - 2(12)}{2} \\ \\ \tt \: w = \dfrac{40 - 24}{2} \\ \\ \tt \: w = \dfrac{16}{2} \\ \\ \tt \orange{ w = 8}[/tex]

Therefore, 8cm is the width of the rectangle.

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