+0  
 
+1
145
1
avatar+98 

Circle A has a radius of 8 cm.
To the nearest hundredth, what is the length (not in degrees) of arc RC?

 

 
  

Question options:

9.77 cm

19.54 cm

78.15 cm

6.22 cm

ForgottenMoon  Jun 5, 2018
 #1
avatar+12561 
+2

IF RAM is a diameter, then  ANGLE RAC   is 180 degrees - 40 = 120 degrees.

 

The TOTAL circumference of the 360 degree circle is  pi x d     =  pi x 2 r = pi x 2 x 8

The fraction of this total circumference is  140 degrees oout of 360 degrees  or   140/360 of the entire circumference

 

Thi.s equals    (140/360 )  *  pi * 2 * 8 = 19.55 cm

ElectricPavlov  Jun 5, 2018

6 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.