Answer:
The measure of ∠CFD is 105°
Step-by-step explanation:
Given the figure of isosceles triangle in which measure of ∠DEF=75°
∠DEF≅∠DFE
we have to find the measure of ∠CFD
As CG is a straight line
Therefore ∠CFD and ∠DFE forms a linear pair
⇒ ∠CFD + ∠DFE=180°
∠CFD + ∠DEF=180° ( as ∠DEF≅∠DFE)
∠CFD + 75=180°
∠CFD = 180-75=105°
Hence, the measure of ∠CFD is 105°
Option 1 is correct
