Question

If in a $\Delta ABC,\angle A={60}^{\circ }$ and AB = AC then $\Delta ABC$ is__

• A. An equilateral
• B. An isosceles right angled triangle
• C. A right angled triangle
• D. None of these

Answer 1

Answer: (A)

An equilateral

If AB = AC then $\angle B=\angle C=\frac{180-A}{2}=60$

$\because$ all angles are equal, it's an equilateral triangle