There are four points on a line: A, B, C and D, so that AB=1, BC=2, CD=4. Find the length of segment AD .Consider all possibilities and draw a picture for each one of them.

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Answer:

The answer is 7

Length of all the the three segments is equal to the length of the line segment AD

Ver imagen cijigeorge1976
AB (1)+BC (2)+CD (4)= 7
So AD would equal 7