Answer:


Step-by-step explanation:
Given

Required
Determine KBC and ABC
Since BK bisects ABK, then

Substitute 28.3 for ABK

Using same point as above
<em>Since BK bisects ABK, then</em>



Surface area is 4piR^2
Volume is 4/3 piR^3
R is the radius (half the diameter). Just plug in the numbers
For 9, do 0.5*6*9.2*5 to get the total area of the visual triangles, add that to 0.5*6*4.1*5 to get the area of the pentagon and you should get 199.5 cm^2for 10, do 0.5*6.9*8*12 to get the total area of the figure and you should get 331.2 cm^2