21 POINTS PLEASE HELP
The length of Side C D is 11 inches and the length of Side C F is 11 StartRoot 3 EndRoot inches. What is the length of Side D F? Round to the nearest tenth.
A cube. The top face has points A, B, D, C. The bottom face has points E, F, H, G.
A) 11 inches
B) 15.6 inches
C) 19.1 inches
D) 22 inches