What is greatest common factor of 60, 84, 24

The greatest common factor of the 3 listed numbers, is 12.

This can be found by simply writing out all the factors of each number.
24's factors are: 1,2,3,4,6,8,12,24
60's factors are: 1,2,3,4,5,6,10,12,15,20,30,60
84's factors are: 1,2,3,4,6,7,12,14,21,42,84
The highest factor shown is 12.

I hope this helps!

The greatest common factor of 60, 24, and 84 is 12

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's