Answer:
AB = 14 units
Explanation:
Given:
A triangle GHJ with the following aspects:
A, B, C are midpoints of sides GH, HJ and GJ respectively.
AB =

GJ =

Midsegment Theorem:
The line segment joining the midpoints of any two sides of a triangle is parallel to the third side and the length of the midsegment is one-half of the length of the third side.
Therefore, AB is the midsegment of sides GH and HJ and thus, is parallel to GJ and equal to one-half the length of GJ.
Now, plug in the values of AB and Gj and solve for 'x'.
This gives,

Now, the length of AB is given by plugging in 2 for 'x'.

Therefore, the length of midsegment AB is 14 units.