Which one of the following is not true for the equilateral triangle ABC given below?

• A.  \[\frac{\text{AB}+\text{AC}}{2}=\text{BC}\]
• B. \[\angle \text{BAC}+\angle \text{ACB}=120{}^\circ \]
• C.  Discount = Rs. 10, Selling price = Rs. 140
• D.  \[\frac{\angle \text{BAC}+\angle \text{ACB}+\angle \text{ABC}}{2}=2\times 90{}^\circ \]
• E. None of these