Need confirmation of arc length of a semicircle

G

Gr8fu13

Junior Member
Joined
Feb 13, 2011
Messages
123
The diameter is 16 miles of a semicircle. I need to find the arc length. I used the following formula. Please tell me if this is correct. Thanks!

1/2 x 2(pi)r =

I filled in what I new. The radius is half the diameter so I filled in 8 for r.

1/2 x 2(pi)8 = 8(pi)

Would this be correct? Thanks!
 
Gr8fu13 said:
The diameter is 16 miles of a semicircle. I need to find the arc length. I used the following formula. Please tell me if this is correct. Thanks!

1/2 x 2(pi)r =

I filled in what I new. The radius is half the diameter so I filled in 8 for r.

1/2 x 2(pi)8 = 8(pi) = 25.1 = 25 miles

Would this be correct? Thanks!
Click to expand...

Good work. Depending on class requirement you may want to add the units and significant digits as indicated.
 
You must log in or register to reply here.
Top