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3 years ago

I don't understand how to find the area of a circle

Mathematics

2 answers:

Liula [17]3 years ago

6 0

You have to find out the radius of the circle so u have to find it in the middle of the circle

Darina [25.2K]3 years ago

6 0

Area of a circle is calculated by this expression....

A = πR²

What this says is Area is equal to the radius squared times pi (3.14 for all intensive purposes.)

So, we need to find A (area.)

We know the diameter (d) is twice the radius, and we know that the diameter is 10.

10/2 = 5.

The radius is 5.

A = π5²

5² = 5 x 5 = 25

A = π25

3.14 (π) * 25 = 78.5

The area of the circle with the diameter of 10 is 78.5 roughly. This is not exact but for what you are doing it will suffice.

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Bumek [7]

Answer:

side of base, a = 10.1 inches, height, h = 40.1 inches

Step-by-step explanation:

Volume of rectangular solid, V = 4096 cubic inches

Let the side of base is a and the height is h.

$V = a^2h\\\\4096 = a^2 h ..... (1)$

surface area of the solid

$S = 2a^2 + 4 ah \\\\S = 2a^2 + 4 \times a \times \frac{4096}{a^2} from (1)\\\S = 2a^2 + \frac{4096}{a}\\\\\frac{dS}{da}= 4 a - \frac{4096}{a^2}\\\\4 a - \frac{4096}{a^2} = 0 \\\\a^3 = 1024\\\\a =10.1 inches$

So, h = 40.2 inches

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2 years ago

What is the measure of angle ABC

sertanlavr [38]

3x+25=90
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3x=65
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I hope this helps!

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3 years ago

a biologist counted 15 squirrels in 3 acres of forest. based on that data how many squirrels would be expected yo inhabit a 275

VLD [36.1K]

Answer:

Step-by-step explanation:

275/3=91.6 recurring

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3 years ago

Omar ordered his sister a birthday card from a company that randomly selects a card from their inventory. The company has 21 tot

Ksju [112]

Answer:

P = 7

Step-by-step explanation:

We have 21 total cards and out of those 21 cards, 14 of those are birthday cards. So that means that the amount of cards that are not birthday cards is the number of cards subtracted by the number of birthday cards, also shown as 21 - 14. So 21 - 14 = P, so now we solve what 21 - 14 is which is 7, so that means P = 7.

Let me know if you have any questions.

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3 years ago

What is the length of the hypotenuse of a right triangle with legs or 5cm and 6cm

Oksana_A [137]

Answer:

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Step-by-step explanation:

5 squared + 6 squared = hypotenuse squared

square root of (5 squared + 6 squared)= hypotenuse

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2 years ago

Read 2 more answers