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19cm = 7.5" appro.
is 19cm the same as 7.2 inches
Yes it is. 19cm=190mm. 25mm=2.5cm.
In order to convert centimeters to inches you need to divide the number by 2.54 (because that is how many centimeters are in one inch). 2.54 x 19 = 7.48 Therefore 19 cm = 7.48 in.
I cut out the lengths to have a visual look at the problem and the answer is NO you cannot arrange 5cm, 12cm, and 19cm into a triangle. Even straightening out the lengths of 5cm and 12cm into a 180 degree angle will not measure out to the 19cm. You cannot have a side that is more than the length of the other two sides combined in a triangle.