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Two rectangles are similar. One has a length of 10 cm and a width of 8 cm, and the other has a width of 7 cm. Find the length of the second rectangle. Round to the nearest tenth if necessary.

 Jan 15, 2020

Best Answer 

 #2
avatar+36916 
+2

7 is to 8     as   x is to 10

7/8 = x/10

x = 7/8 * 10= 70/8 = 8 3/4 cm

 Jan 15, 2020
 #1
avatar+122 
+1

If by similar you mean the area is the same then you find the area of the first.
10*8=80cm^2.

The second triangle then is 7*x=80 which can be rewritten as  x=80/7 => x=11.4.

 

 Jan 15, 2020
 #2
avatar+36916 
+2
Best Answer

7 is to 8     as   x is to 10

7/8 = x/10

x = 7/8 * 10= 70/8 = 8 3/4 cm

ElectricPavlov Jan 15, 2020
 #3
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10 / 8 = 1.25

1.25 * 7 = 8.75

Ratio:    10 : 8 = 8.75 : 7

 Jan 16, 2020

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