Find the area of circle A.

100 π ft.2

50 π ft.2

100 π2 ft.2

25 π ft.2

Question

Find the area of circle A.

100 π ft.2

50 π ft.2

100 π2 ft.2

25 π ft.2

venomous.penguin · Answer

|dw:1471090897775:dw|

ribhu · Answer

pi * radius*radius = pi* 25 ft2...option D

venomous.penguin · Answer

How did you get that? 
Do you have you to multiply 5 twice?

amorfide · Answer

$$A=pir^{2}$$
where A is area
pi is 3.14
r is radius

radius is half the diameter

diameter is the length from one side to the other of the circle
radius in this case = 5

venomous.penguin · Answer

Oh okay thank you. I think I understand a little better now.

mathmale · Answer

The formula for the area of a circle involves the SQUARING of the length of the radius.  "Square of 3," written as 3^2, does involve multiplying 3 by itself.

Please use the symbol  ^  for exponentiation.  100 π ft.2 is not correct; instead, please write 100 π ft^2.