Fill in the Blanks Fill in the Blanks.Online version facts about area of a circle. by Ysmael Rayman 1 area inside boundary The term refers to the space the or perimeter of a closed shape . 2 circle square units number The area of a circle is the of inside the . 3 area A formula The for the of the circle is = ? rx r 4 divide The first thing to do , if the given is diameter , the diameter by 2 . 5 length base product The formula for the area of parallelogram is the of the of its .