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3 years ago

If the area of a circle is 81π, then what is the diameter of the circle?

Mathematics

1 answer:

viva [34]3 years ago

7 0

Answer:

Step-by-step explanation:

81π=πr^2

r= 9,-9

9+9=18

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Bad White [126]

Answer:

Step-by-step explanation:

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2 1/2 = 2.5

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3 years ago

Glen hiked 14 miles in 4 hours what was his average rate of speed and the formula to use

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation: if they do 12 acres per day.. it would be 36 for three days. 12x3=36

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4 years ago

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c) 40%

Step-by-step explanation:

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3 years ago

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Suppose that triangle ABC is a right triangle with a right angle at C and hypotenuse C. Also note that a is the length of the si

gavmur [86]

Answer:

The value of a is 7.4833. The value of $A=29.9262^0$ and $B=60.0735^0$ .

Step-by-step explanation:

Consider the provided information.

The required figure is shown below:

We need to find the value of a.

Calculate the value of a by using Pythagorean theorem.

$a^2+b^2=c^2$

$a^2+(13)^2=(15)^2$

$a^2=225-169$

$a^2=56$

$a=7.4833$

Hence, the value of a is 7.4833.

Now find the value of angle A as shown:

$\sin A=\frac{a}{c}$

$\sin A=\frac{7.4833}{15}$

$A=sin^{-1}(0.4989)$

$A=29.9262^0$

Find the value of angle B as shown:

$\sin B=\frac{b}{c}$

$\sin B=\frac{13}{15}$

$B=sin^{-1}(0.8667)$

$B=60.0735^0$

Hence, the value of $A=29.9262^0$ and $B=60.0735^0$ .

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3 years ago

If the area of a circle is 81π, then what is the diameter of the circle?​

If the area of a circle is 81π, then what is the diameter of the circle?