Asector is formed in a circle by two radii and an arc that measures 20 degrees . the area of the sector is 27cm squared what is the area of the entire circle

Let's try visualizing it.  A sector is basically a pizza slice.  A circle is 360 degrees.  If they are telling you that the pizza is taking up 20 of those 360 degrees, how many equally sized slices can you have? (Hint, 360/20 )  If you take that answer and multiply it by the area that is given to you, you would find the area of the circle.  Hope this helps!