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Mandarinka [93]
3 years ago
12

What is the area of the circle?

Mathematics
1 answer:
dmitriy555 [2]3 years ago
8 0

We know that the area of a circle has the formula A=πr²

We are given the diameter, and as we know that the diameter is twice the radius, we can divide the given diameter by 2.

27 ÷ 2= 13.5

Now, plug-in the number into the formula.

A=πr²

A=π×13.5²

A=π×182.25

(Assume π=3.14)

A=3.14 × 182.25

A=572.265

A=572.3 square meters.

Therefore, the area of the circle is 572.3 square meters.

You might be interested in
a chord of 12cm long of 8cm is away from the of the circle what is the lenght of the chord which is 6cm away from the centre
lana66690 [7]

Answer:

The length of the chord is 16 cm

Step-by-step explanation:

Mathematically, a line from the center of the circle to a chord divides the chord into 2 equal portions

From the first part of the question, we can get the radius of the circle

The radius form the hypotenuse, the two-portions of the chord (12/2 = 6 cm) and the distance from the center to the chord forms the other side of the triangle

Thus, by Pythagoras’ theorem; the square of the hypotenuse equals the sum of the squares of the two other sides

Thus,

r^2 = 8^2 + 6^2

r^2= 64 + 36

r^2 = 100

r = 10 cm

Now, we want to get a chord length which is 6 cm away from the circle center

let the half-portion that forms the right triangle be c

Using Pythagoras’ theorem;

10^2 = 6^2 + c^2

c^2 = 100-36

c^2 = 64

c = 8

The full

length of the chord is 2 * 8 = 16 cm

5 0
3 years ago
What the result of √[(-2a)^ 2]
Tanya [424]
If you take the square root of a number squared number then they cancel each other out and the number stays the same i.e. √[(4)^2] would equal 4.

In this problem the square root and numbered squared cancel out to leave the problem as -2a.

The solution of this problem is -2a
3 0
3 years ago
Anyone understand this if so plz respond with answer
Archy [21]

Answer:

I dont know the answer

Step-by-step explanation:

But you can find the answer by figuring out what a domain and a range iss and chose which one is a domain and a range you can find what a domain and a range is on google

6 0
3 years ago
Read 2 more answers
Can you help me please
grigory [225]

m is 43



add my instagarm @jessica.letendre

5 0
3 years ago
Plz help I want to ace this
nikklg [1K]

Answer:

B

Step-by-step explanation:

You multiply the 3 numbers.

6 0
3 years ago
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