knightmaster8260 knightmaster8260

04-11-2018
Mathematics

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Please! Help! ASAP! Thank u!
Given the perimeter of a rectangle and either the length or width, find the unknown measurement using the appropriate formula. The Perimeter is 76 cm and the length is 20 cm. What is the width of the rectangle? Show all your work.

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Karima6 Karima6

04-11-2018

Perimeter of a rectangle = (length x 2) + (width x 2)

Let width = x

76cm = (2 x 20) + 2x

76 = 40 + 2x

36 = 2x

x = 18cm

Width = 18cm

Hope this helps :)

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