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The perimeter of the rectangle is 50 cm. If the width is 12 cm, what is the area? Step 1: Find the length. perimeter = 2 x (width + length) 50 = 2 x (12 + length) length = [ ]cm Step 2: Find the area. Get the width & length from Step 1. area = width x length area = [ ]square cm

 May 12, 2015

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 #1
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The opposite sides of a rectangle have equal length. Since the width is 12cm, that means the two width sides added together give you a length of 24 cm.

Since the total length(perimeter) is 50cm, we subtract 24cm from 50cm to get 26 cm remaining for the last two sides. Remember these sides are equal length, so we can divide 26 by 2 to get the length of one side, that is 13cm.

Now area of a rectangle is width x height, so 12cm x 13cm = 156 cm squared.

 May 12, 2015
 #1
avatar+249 
+10
Best Answer

The opposite sides of a rectangle have equal length. Since the width is 12cm, that means the two width sides added together give you a length of 24 cm.

Since the total length(perimeter) is 50cm, we subtract 24cm from 50cm to get 26 cm remaining for the last two sides. Remember these sides are equal length, so we can divide 26 by 2 to get the length of one side, that is 13cm.

Now area of a rectangle is width x height, so 12cm x 13cm = 156 cm squared.

Brodudedoodebrodude May 12, 2015

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