Answer:
The correct option is 2. The length of JG is 5 units.
Explanation:
Given information: ∠EDH ≅ ∠EDG, EH=9, EJ=4.
Corresponding sides of two triangles are congruent.
(CPCTC)
.... (1)
From the given figure it is clear that
![EG=EJ+JG](https://img.qammunity.org/2020/formulas/mathematics/middle-school/rlsc187qd76rq22g3c61gvz2ozehdbqr3i.png)
... (2)
Using (1) and (2), we get
![9=4+JG](https://img.qammunity.org/2020/formulas/mathematics/middle-school/cgwr0rfa970pggkduxy4avnxvj7d37eskc.png)
Subtract 4 from both the sides.
![9-4=JG](https://img.qammunity.org/2020/formulas/mathematics/middle-school/g6ulnexm3hat2wr00fxuedj0ggji45yq33.png)
![5=JG](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ydz1jhacefdvpyosh6qy55ctd04h0j0vlx.png)
The measure of JG is 5 units, therefore the correct option is 2.