Find the area of an equilateral triangle inscribed in a circle with radius R

In the figure,

What is the rotational symmetry of a wheel

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

What is the slope of the equation y =