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Gennadij [26K]
3 years ago
14

Calculate the area of the shaded sector in the circle​

Mathematics
1 answer:
scZoUnD [109]3 years ago
5 0

Answer:

area ≈ 6.3 units²

Step-by-step explanation:

Calculate the area (A ) of the sector as

A = area of circle × fraction of circle

   = πr² × \frac{45}{360}

   = π × 4² × \frac{1}{8}

    = 16π × \frac{1}{8} ← cancel 8 and 16 by 8, leaving

A = 2π ≈ 6.3 units² ( to 1 dec. place )

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A circle has an arc of length 20π that is intercepted by a central angle of 180°. What is the radius of the circle?
Bond [772]

Answer:

10π

Step-by-step explanation:

RULE:  The angle measure of the central angle is congruent to the measure of the intercepted arc.  

RULE:  Central Angle = Arc length

Given:  

Arc length (20 π) = central angle (180)

we know 180 degrees is a straight line, thus a semi-circle is created.  This would be the diameter.  

1/2 diameter is the radius.  20π/2 is the radius.  

10π

8 0
3 years ago
Using what you have learned about solving systems of equations, find the number that represents the apple, banana, and cherry.
erica [24]

it would be convenient if you actually give us the equation

8 0
3 years ago
Rearrange the equation so q is the independent variable.<br><br> 9q-4=3r-6<br><br> r = __
erik [133]

Answer:r=3q+2/3

Step-by-step explanation:

Step 1: Flip the equation.

3r-6=9q-4

Step 2: Add 6 to both sides.

3r-6+6=9q-4+6

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Step 3: Divide both sides by 3.

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r=3q+2/3

Hopefully it’s right

6 0
3 years ago
Help me with this question please
rjkz [21]

Answer:

A

Step-by-step explanation:

the answer is A I think

5 0
3 years ago
Math question please show work for brainliest :)
yKpoI14uk [10]
Hello!
First of all you look at how many X's the line moves by, in this case it is -3

Then you look at how many y's the line moves by, in this case it is -2

Then you add together the number of X's moved and the number of y's moved:
-3x + -2y
( adding a negative number is the same as subtracting that number)
thus the answer is A. -3x-2y

Hope This helps! :)
5 0
3 years ago
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