Question

Find the area of a sector with a central angle of 170° and a diameter of 9.1 cm. Round to the nearest tenth.

Answer 1

diameter=9.1 cm
radius =9.1/2=4.55 cm
required area \[=\pi r ^{2}*\frac{ 170 }{ 360 }\]

Answer 2

u are asking direct formula based questions... read theory and formulas and den u will solve dem directly.. area= (angle*r^2)/2 where angle is in radian

Answer 3

@gauravkj i got 1759.7125

Answer 4

angle is in radian... 170/180 is the value of angle

Answer 5

@gauravkj i didnt get it

Answer 6

u der

Answer 7

which part u did not get?

Answer 8

area= (angle*r^2)/2 .... (170*4.55^2)/2

Answer 9

am i right

Answer 10

angle is not equals to 170.. it is equal to 170/180;
see it like this.. area of a circle is pie*r*r.. and it is 360 degrees.. urs is 170 degrees.. so area should be = (area of circle/360)*170

Answer 11

then

Answer 12

then area= (170/180)*(radius^2)/2

Answer 13

9.776 i got

Answer 14

lol this is soooooo hard

Answer 15

A. 122.9 cm^2

B. 30.7 cm^2

C. 8.6 cm^2

D. 3.4 cm^2

Answer 16

9.77 cm^2 O.o
u sure these are the only options? lol

Answer 17

yess i am sure i will snap a pic and show u

Answer 18

http://prntscr.com/2s5b61

Answer 19

ohh sorry...... angle is (170/180)*pie.. so silly of me...

Answer 20

u will get 9.776*3.14 times.. so B option

Answer 21

when i told u by that full circle analogy, i was correct then.. made mistake in converting degrees into radians..

Answer 22

lol thanx.. sorry i could not make it easy and interesting for u..

Answer 23

hehe its ok

Answer 24

area=\[\pi r ^{2}*\frac{ 170 }{ 360 }=3.14*(4.55)^{2}*\frac{ 17 }{ 36 }=3.14*20.70*\frac{ 17 }{ 36 }\]
=30.69=30.7cm^2