The circumference of a circle is equal to the diameter times pi. So, let's look at what happens if you double the radius of a circle -- say from 2 to 4. The area will go from 12.56 to 50.24. This means that it has quadrupled.
Answer:
Step-by-step explanation:
hello :
450×21/8=1181,25
Answer:
y= -1/2x + 11/2
Step-by-step explanation:
2/7 = x/10
cross multiply:
10 * 2 = 20
7 * x = 7x
7x = 20
x = 2.857