Find the area for the following shape.

For this case, we have that the figure shown is formed by a square and by two triangles (one on the top and one on the side of the square). By definition, the area of a triangle is given by:

Where:

b: It's the base

h: It's the height

On the other hand, the area of a square is given by;

Where:

l: It's the side of the square.

The total area of the figure will be:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional