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Effectus [21]
3 years ago
8

Find the area of a 120° sector of a circle whose radius is 6.

Mathematics
1 answer:
katrin [286]3 years ago
3 0
First, determine the area of the whole circle by the equation, A = πr². Substituting,
                             A = π(6²) = 36π
Then, multiply this value with the ratio of the given angle to the whole revolution,
                            A(sector) = 36π x (120° / 360°)
The area of the sector is therefore 12π units².
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Multiply by 6
IRISSAK [1]

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Step-by-step explanation:

Because 1x6=6 0+5=5

                6x6=36 5+5=10 ect.

5 0
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3 years ago
Can someone explain this step by step please
kobusy [5.1K]

Answer:

x = - 2

y = 6

Step-by-step explanation:

The best way to do this is to put - 3x in for y in the second equation.

4x - 2(-3x) = - 20        Watch the signs. You have 2 minus signs.

4x - - 6x = -20            Change - - 6x to 6x

4x + 6x = - 20              Add

10x = - 20                   Divide by 10

x = -20/10

x = - 2

============================

Find y

y = - 3x

y = -3 * -2

y = 6

3 0
3 years ago
Can the side of a triangle have lengths 2,8,9?
photoshop1234 [79]

Answer:

Yes

Step-by-step explanation:

The smaller two sides have to be greater than the biggest side.

2+8>9, so it can make a triangle.

3 0
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radium-226, which has a half-life of 1620 years, is used in medicine for treatment of disease. find the value of k for radium-22
sammy [17]
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100 / 2 = 50 / 2 = 25
6 0
3 years ago
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