Question

I need help please.....

Answer 1

Answer:

9.42

Step-by-step explanation:

pretend the missing piece is still there.  Find the area of the piece first.

90/360(3.14*2^2)=

90/360(12.56)=

3.14

the whole circle's area would be 3.14(4)=12.56, since it is a 90 degree angle.

then subtract the area of the piece  12.56-3.14=9.42

Answer 2

Answer:

so a good strategy might be to solve for the entire area of a circle.. then cut that up into quarters and add 3 of those together to get the correct answer

Step-by-step explanation:

area of a circle formula = pi * $r^{2}$

we are given r =2  ( nice and easy to work with )

and we get to use an easy approximation of pi of 3.14

so the whole circle's area is  pi * $2^{2}$

3.14 * 4 = 12.56

that's the entire circle.. divide by 4 the multiply by 3   like this

3/4 * 12.56 = 9.42

you could also think of this as multiplying the entire circle by 3/4 (0.75) if you prefer but it's good to recognize that you can divide it up into 4 parts .. then multiply by 3...