Question

Area...

Answer 1

please explain step by step

Answer 2

So Find the area of the sector of the circle where angle = 2radians.
2 radians = 114.591559
Then divide by 360 to get a fraction.
Now you know that 0.31830988611 of the circle is part of the sector.
Then Area of circle x fraction of sector = area of sector
143.999999967cm^2
So now you just need to take away the triangle.
Find area of triangle. Area = 1/2 * a*a * sin x
a = 12 x= 2rad or 114.591 degreees
So area of triangle = 65.4694147451cm^2
Area of sector - area of triangle = shaded area
shaded area =78.53058 cm^2

Answer 3

Also don't forget to round