To calculate the area of a circle, which formula should be used?
A. A= π⋅r3
B. A= π⋅d
C. A= 2π⋅r
D. A= π⋅r2
How much flooring, in square feet, is needed to cover the floor of the space shown? Enter the measurement only, not the unit.
The answer to the first question is A = pi·r2; but, in the future, it would be a lot quicker and easier for you to check your textbook or "google" the question.
For the second queston: draw a vertical line dividing the picture into two rectangles: a 15 x 30 rectangle on the left and a 12 x 15 rectangle on the right.
Find those two areas and add them together.