Monday, October 25, 2010

Circle P6 2010 SA2 SCGS P2 Q18













[2 marks for (a) and 3 marks for (b)]{Answers given: 116 cm and 364.42 cm (correct to 2 decimal places)]


43  x  2 =  86  cm

86  x  2  =  172  cm

28  x  2  =  56  cm

172  -  56  =  116  cm

a) The length of SR is  116  cm.


86  -  56  =  30  cm

pi  x  30  =   94.247 cm 

2  x  pi  x  43  =  20.177  cm 

94.247  +  20.177  =  364.42 cm (2 dp)


The perimeter is 364.42 cm.

No comments:

Post a Comment