Answer: There are three rotational symmetries of an equilateral triangle: rotation by zero degrees (the identity operation), rotation by 120 degrees, and rotation by 240 degrees. This group of symmetry operations is isomorphic to the cyclic group of 3 elements: [math]C_3.[/math]
Step-by-step explanation:
The answer is b. "at most" means that x + (x + 1) must be smaller than or equal to the other side of the equation.
Answer:
.............hope it helps.......
