a rectangle has a length of 5 cm and width 4cm ecery dimension is tripled to form a 2nd rectangle what is ratio of the 2 areas?

Question

of the two rectangles

Answer 1

First rectangle

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Length=5

Width =4

 

Area= Length x Width

Area= 5*4

Area=20

 

Second rectangle
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Length=5x3=15
Width =4x3=12

Area= Length x Width
Area= 12*15
Area=180

 

Ratio  of two areas (first/second)= 20/180  = 1/9

 

The area of the second rectangle is 9 time more then the first rectangle.

Answer 2

First triangle

 

Length = 5 cm

Width = 4 cm

Area = 20 cm²

 

 

Second triangle.  Its dimensions are 3 times of the first triangle.

 

Length = 15 cm

Width = 12 cm

Area = 180 cm²

 

 

To find the ratios, we divide the area of the 2nd triangle by the area of the 1st triangle.

 

180 cm² / 20 cm² = 9

 

 

The ratio of the areas is 9.