∴ Therefore the area of non shaded =
 square units
 square units
Explanation:
Given , the diameter of the circle is 6 units
radius 
 = 3 units
 = 3 units 
The height of the triangle = the radius of the circle = 3 units 
And the base of the triangle = 6 units
∴the area of the circle = 
 =
 =
 square units =
 square units = 
 square units
 square units 
∴The area of the triangle 
 
 
 = 
 square units
 square units
 = 9 square units 
∴ Therefore the area of non shaded =(
 -9) square units
-9) square units
 =
 square units
 square units