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DENIUS [597]
3 years ago
11

How do u find the circumference of a circle

Mathematics
1 answer:
grin007 [14]3 years ago
7 0
The Circumference of a circle is 2 Pi R, meaning 2 x Pi (3.14 standardized) x R, the radius.
Or, Pi x D, the Diameter, since 2R = D.
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A satellite is 19,000 miles from the horizon of Earth. Earth’s radius is about 4,000 miles. Find the approximate distance the sa
Jobisdone [24]

Answer:

The approximate distance is 15416 miles....

Step-by-step explanation:

We have given:

A satellite is 19,000 miles from the horizon of earth.

The radius is 4,000 miles.

Lets say that BC =x

AO = OB = 4,000 miles

AC = 19,000 miles

The tangent from the external point forms right angle with the radius of the circle.

So in ΔABC

(OC)² = (AC)²+(OA)²

where OC = x+4000

AC = 19,000

OA = 4000

Therefore,

(x+4000)² = (19,000)² +(4,000)²

Take square root at both sides:

√(x+4000)²  = √(19,000)² +(4,000)²

x+4000  =√361000000+16000000

x+4000 = √377000000

x+4000 = 19416.48

x= 19416.48 - 4000

x = 15416.48

Therefore the approximate distance is 15416 miles....

6 0
3 years ago
On a field trip there are 18 chaperones supervising 81 children. If the children are broken into groups how many adults are need
Butoxors [25]

Answer:

6

Step-by-step explanation:

you first divide 81 by 18 and get 4.5, that is the number of children per adult.

next you'll divide 27 by 4.5 and 6.

that's the answer.

3 0
3 years ago
Determine if triangle DEF with coordinates D (3, 2), E (4, 6), and F (7, 3) is an equilateral triangle. Use evidence to support
Anna [14]
<span>Use the formula d=sqrt[(x₂-x₁)^2+(y₂-y₁)^2] to find distance between 2 points.
DE = </span><span>√17
EF = </span><span>√18
FD = </span><span>√17
See the attachment for the complete workout.
Since,All the sides are not same to make an equilateral triangle.
So its not an equilateral triangle</span>

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3 years ago
What is the slope of this line?
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Answer:

the slope of this line is 3/4

Step-by-step explanation:

4 0
2 years ago
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ankoles [38]
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3 0
3 years ago
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