The formula to find the volume of a sphere is: V=

Since the diameter is 18 cm, so the radius is equal to r=18/2 = 9
Now we replace r by it's value, so we get:



And we get approximately

Hope this Helps :D
Answer:
identical in form or shape
Step-by-step explanation:
two triangles could be congruent as they both have 3 sides.