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3 years ago

A circle has a diameter of 18 feet. Which following is closest to the l circumference of the circle?

Mathematics

2 answers:

lara [203]3 years ago

6 0

circumference =2×pi×r

18/2=9(r)

so...2×pi×9

=54..5

Reika [66]3 years ago

5 0

Answer:

56.5 ft

Step-by-step explanation:

We define the number π as the ratio between the circumference and diameter of a circle: π = c/d. Rearranging this equation gives us one for the circumference: c = πd. Using an approximation of π ≈ 3.14 and our value of d = 18 feet, we can find that c = 3.14(18) = 56.52 ft, or 56.5 ft, rounded to the nearest tenth.

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Will mark brainliest and give 20 points!

Salsk061 [2.6K]

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3 years ago

If a triangle has a heig of 14 inches and base of 9 inches whats its area?

vlada-n [284]

Answer:

63 inches

Step-by-step explanation:

the formula for the area of a triangle is

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4 years ago

What is the solution to the following system?

katrin2010 [14]

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Step-by-step explanation:

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3 years ago

Solve for x. x= In e x=

IgorLugansk [536]

Good morning ☕️

Answer:

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Step-by-step explanation:

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3 0

3 years ago

HELP NEEDED, GIVING BRAINLIEST!

Nataly_w [17]

The correct answer is:

B. This is a dilation about (0, 0) with a scale factor of 4; A'(8, 4), B' (16, 4), C' (16, -12).

Step-by-step explanation:

Given

Dilation: D : (x,y) => (4x,4y)

And Vertices

A ( 2, 1 ), B ( 4, 1 ), C ( 4, -3 )

Applying dilation on all vertices

$A ( 2, 1 ) => A'(4*2, 4*1) => A'(8,4)\\B ( 4, 1 ) = > B' (4*4 ,4*1) = > B'(16,4)\\C(4,-3) => C' (4*4 , 4*-3) => C'(16, -12)$

To find the scale factor,

As we are multiplying each vertex coordinate by 4, the dilation factor is 4.

Moreover,

$\frac{A'}{A} = \frac{(8,4)}{(2,1)} = (4,4)$

Hence the scale factor is 4.

So,

The correct answer is:

B. This is a dilation about (0, 0) with a scale factor of 4; A'(8, 4), B' (16, 4), C' (16, -12).

Keywords: Dilation, Scale factor

Learn more about dilation at:

#LearnwithBrainly

4 0

3 years ago