The circumference of a circle is:
C=πd, since we are told that d=10in
C=10π in
C≈31.4 in (to nearest tenth of an inch)
Answer:
b
Step-by-step explanation:
because 1/4 times 2 is 1/2
Answer:
All
Step-by-step explanation:
The answer is 1, 2, 3
I, II, III
circumference = PI x D
circumference is given as 27 inches
so 27 = PI x D
27=3.14xD
so D=27/3.14 = 8.598,
radius = (1/2)D = 4.30 inches
The shaded region is actually a sector and the formula for the area of a sector is:
central angle/360 x pi x radius squared, which is basically a fraction of the area of the circle. With this basic background knowledge, all we have to do is substitute the values into the formula.
(80/36) x pi x 81
= 80/4 x pi x 9
= 720/4 x pi
= 180pi cm squared.
