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Nadya [2.5K]
3 years ago
8

Find the area of the circle.

Mathematics
2 answers:
kirill [66]3 years ago
8 0

Answer:

C. 254.34 in^2

Step-by-step explanation:

The formula for area of a circle is πr² (pi x radius x radius).

Here, only the diameter is shown.

To find the radius, divide the diameter by 2.

18 / 2 = 9

9 is the radius.

We use 3.14 as π (pi).

Now we have the final equation.

pi x radius x radius

3.14 x 9 x 9 = 254.34 in^2.

Therefore, the area of the circle is 254.34 in^2.

notsponge [240]3 years ago
3 0

Answer:

have of 18 is 9

9^2 is 81

81 x 3.14(pi) = 254.34

Formula of area of a circle:

half of diameter or given radius squared

Times

3.14(pi) or whatever you use for pi.

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An athletic field is a 60 yd60 yd​-by-120 yd120 yd ​rectangle, with a semicircle at each of the short sides. A running track 101
gregori [183]

Distance of each track are:

D₁ = 428.5 yd

D₂ = 436.35 yd

D₃ = 444.20 yd

D₄ = 452.05 yd

D₅ = 459.91 yd

D₆ = 467.76 yd

D₇ = 475.61 yd

D₈ = 483.47 yd

<u>Explanation:</u>

Given:

Track is divided into 8 lanes.

The length around each track is the two lengths of the rectangle plus the two lengths of the semi-circle with varying diameters.

Thus,

D = 2(120) + 2. \frac{1}{2} \pi d\\\\D = 240 + \pi d

Starting from the innermost edge with a diameter of 60yd.

Each lane is 10/8 = 1.25yd

So, the diameter increases by 2(1.25) = 2.5 yd each lane going outward.

So, the distances are:

D₁ = 240 + π (60) → 428.5yd

D₂ = 240 + π(60 + 2.5) → 436.35 yd

D₃ = 240 + π(60 + 5) → 444.20 yd

D₄ = 240 + π(60 + 7.5) → 452.05 yd

D₅ = 240 + π(60 + 10) → 459.91 yd

D₆ = 24 + π(60 + 12.5) → 467.76 yd

D₇ = 240 + π(60 + 15) → 475.61 yd

D₈ = 240 + π(60 + 17.5) → 483.47 yd

4 0
4 years ago
Anybody know the answer?
maks197457 [2]

We know that the sum of measures of internal angles in each quadrangle is 360°.

Look at the picture.

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3 years ago
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Answer:

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4 0
4 years ago
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Two lines, C and D, are represented by the equations given below:
hammer [34]
Given:
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line C: y = 6 + 14 = 20  or y = 3 + 14 = 17
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4 years ago
1 + 1 =<br> long method pls
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