Question

i put (170/ 360) * (3.14*9.1*9.1/4) and none of my answers match , does anyone know the problem?????
Find the area of a sector with a central angle of 170° and a diameter of 9.1 cm. Round to the nearest tenth.
A. 122.9 cm2

B. 30.7 cm2

C. 8.6 cm2

D. 3.4 cm2

Answer 1

the radius is 9.1/2 = 4.55

Answer 2

so you use that instead of the 9.1

Answer 3

i got 1 after i multiplied it all and then divided :/ i had 11050/1440 was that correct?

Answer 4

now divide the two

Answer 5

i got 1

Answer 6

that's not correct

11050/1440 is not 1

Answer 7

sorry i pressed the wrong symbol , i got 7.673.....

Answer 8

which would make it C , correct?

Answer 9

no, one sec

Answer 10

oh i see what's wrong, not sure why i didn't catch it til now


A = (angle/360)*(pi*r*r)


A = (170/360)*(3.14*4.55*4.55)


A = (0.47222222)*(3.14*4.55*4.55)


A = (0.47222222)*(65.00585)


A = 30.697206799987


A = 30.7


So the answer is actually choice B

Answer 11

thanks a million for your help! :)

Answer 12

yw