एक समबाहु त्रिभुज (equilateral triangle) में कितनी सममिति रेखाएँ (lines of symmetry) होती हैं?

Which of the following capital letters of the English alphabet possesses rotational symmetry but does NOT possess any line symmetry?

Consider the following geometric shapes: A. Equilateral triangle B. Rectangle C. Rhombus D. Isosceles triangle Which of these shapes have exactly two lines of symmetry?