34. The diagram shows a sector of a circle of radius 10 cm. a) Find, as a multiple of t, the arc length of the sector.
The straight edges are brought together to make a cone.
Calculate:
b) the radius of the base of the cone
c) the vertical height of the cone.

rc  length  =  10 * 8pi/5

 =   16pi

This is the circumference of the base

(a)   2pir     =   16pi  where  r  =  radius of base

  2r     =    16

   r     =  8 cm

(b)   10^2    =   h^2   +  8^2

 h^2    =   100  -  64

  =    36

h      =    6 cm

21/58.

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