Answer:
Option A) 2 square root 3
Step-by-step explanation:
we know that
The equilateral triangle has three equal sides and three equal angles (60 degrees each)
The triangle BOD is a right triangle
we have
<OBD=(60°/2)=30°
BD=12/2=6 units
tan(<OBD)=DO/BD
tan(30°)=DO/6
DO=6*tan(30°)
DO=2√3 units
