Well, each centimeter is 10 millimeters. 25cm=250mm
Answer:

Step-by-step explanation:

After removing one black marble:

Answer:
60 degrees per angle.
Step-by-step explanation: a triangle has a total of 180 degrees, and the number of sides determine the number of angles it has. in this case, it's an equilateral triangle. 180/3 = 60. all triangles have 3 sides if you didn't know that ;)
The answer is C.2 that is the answer