Answer:
x = 10
Step-by-step explanation:
DE is the midsegment joining the midpoints of BC and AC respectively.
Therefore, by the property of midsegment of a triangle,
DE will be parallel and half of the measure of the third side of the triangle.
DE = [tex]\frac{1}{2}(AB)[/tex]
5 = [tex]\frac{x}{2}[/tex]
x = 10 units
