Question

Find the length of AC. AB=36cm

Answer 1

Well it is diameter and radius!

Answer 2

I know diameter would be 36 and the radius would be 18

Answer 3

Right!

Answer 4

Any point to the middle of the circle is what?

Answer 5

All the points on the circle to the center of the circle are the same length

Answer 6

it would be the radius

Answer 7

YUP! which is 18

Answer 8

so then do i use the radius to find ac?

Answer 9

No the radius is ac...

Answer 10

I mean the diameter is ac

Answer 11

oh

Answer 12

2pi*r*angle/360= lenght

Answer 13

Because ap is 18 and pc is 18

Answer 14

2*pi*18*150/360=AC

Answer 15

This got confusing...Whats the name of that equation @cinar

Answer 16

I always thought you used that to find arc lengths

Answer 17

2*pi*r= circumstances of circle right?
2*pi*r*angle/360= arc length corresponding to the angle..

Answer 18

2*pi*r*360/360= circumstances of circle =2*pi*r
2*pi*r*180/360=length of half circle=pi*r
2*pi*r*90/360=length of quarter=pi*r/2
2*pi*r*angle/360=length of arc corresponding to the angle..

Answer 19

for example length of BC=2*pi*r*30/360=2*pi*18*30*360