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108 cm

Step-by-step explanation: rectangle formula = length time width

triangle formula = .5 times base times height

-so 12 times 5 is 60

-next to figure out the height of each triangle i am going to subtract 5 from 13 which equals 8, but there are 2 triangles so I will divide 8 by 2 which is 4

-the height of each triangle is 4 and the base is 12

- .5 times 12 times 4 equals 24

-but there are 2 triangle so instead of adding 60 and 24 it has to be 60+24+24 which equals 108

answer

explanation

the area of a circle is calculated using the formula

or

we can use any of the above formulae to calculate the required. preferably, let us use the latter since the diameter is

we substitute the diameter into the formula to get:

this is the exact value for the area of the circle.

the correct answer is a