Question

what is the area of this shaded portion?

Answer 1

3.56 x 16 - 3.14

Answer 2

53.82? is not one of my options though

Answer 3

First you must find the area of the square. This will be \[16^2\]. Then subtract from this the area of the circle which is \[\pi r^2\]. The diameter of the circle is the same as the height of the square

Answer 4

You want to find the perimeter by 4a then subtract 16

Answer 5

...I don't think you need the perimeter

Answer 6

so 16*16 is 256. and then what's next?

Answer 7

Thats the area of the square. Now subtract the area of the circle i.e \[3.14\times r^2\]

Answer 8

whats the area of the circle ?

Answer 9

\[3.14 \times r^2\]! :P

Answer 10

803.84 !

Answer 11

no that is the diameter you have used! The radius is half the diameter :)

Answer 12

okay, so its 401.92

Answer 13

It should be half of that. You have multiplied it by 2 somewhere

Answer 14

3.14 x 8^2

Answer 15

200.96

Answer 16

Thats it. Now if you subtract the area of the circle from the area of the square you'll be left with the part inside the square but not inside the circle. Thats the shaded bit :)

Answer 17

ok so 200.96 is the area of the circle.

Answer 18

so the area of the square is 256 ? right?

Answer 19

so it must be D right

Answer 20

Yeah D is the correct answer :)