9 is the value of each side. There are 7 sides so 63 divided by 7 is 9.
The area of the washer will be the area of the smaller circle SUBTRACTED from the area of the larger circle.
Area of a circle = pi * r^2 where r is your radius (which is half the diameter).
Larger circle area = pi *(diameter/2) ^2.
Smaller circle area = pi * (13.2/2)^2 = pi * 6.6^2 = 136.8484....
So...the area of the washer = larger circle area - 136.4848...
Answer:
what is the question
Step-by-step explanation:
Answer:
a.) 45
b.) 60
c.) 58
d. )77
e.) 135
Step-by-step explanation:
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