Suppose the radius of a circle is 3 units what is the circumference
1 answer:
Answer:
or approximately
units
Step-by-step explanation:
The formula for finding the circumference of a circle is , where
= circumference and
= radius. In this case,
, so after plugging that into
, we get:
Since is approximately
,
, which rounds to
. Therefore, the circumference of the circle is
, or approximately
units. Hope this helps!
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Answer:
perimeter of the shaded region = 88 +44+28 =160 cm
Step-by-step explanation:
perimeter of shaded region = length AO + arc OB + arc AB
length AO = radius of bigger circle
radius of bigger circle = OX + OB = 2×radius of smaller circle = 2×14 cm = 28 cm
therefore AO = 28 cm
length of arc oB= half of circumference of smaller circle = ×14 = 44 cm
length of arc ab = half of circumference of bigger circle = ×28 =
×28= 88
therefore perimeter of the shaded region = 88 +44+28 =160 cm
area of the shaded region = half of area of bigger circle - half of area of smaller circle
=
=
solving we gen area of shaded region = 924
<h3>4 Answers: A, C, E, and F</h3>
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Explanation:
Choice A is true assuming we have
In this case, and
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Choice B is false. See choice A above.
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Choice C is true. The sequence is decreasing. As n gets larger,
gets smaller. This is because the denominator is growing larger with the numerator held constant.
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Choice D is false. This contradicts choice C.
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Choice E is true since the denominator is growing forever
This is similar to
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Choice F is true due to choices C and E being true.
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Choice G is false because it contradicts choice F.