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1 year ago

Assume the radius of a circle is

Mathematics

1 answer:

Lisa [10]1 year ago

7 0

Answer:

Step-by-step explanation:

They want you to see how radius is important. Just remember that one radian is one radius, that should help you see why radius is important.

They ask for the unit circle , that is a circle of one unit for the radius, which makes it super easy to calculate things for it, they ask what is the area, which is that famous formula, π $r^{2}$ , then they ask what's its circumference. which is that other famous formula 2πr

so to go all the way around a circle of one unit radius, it's 2π exactly or about 6.28..... units, call it meters, or feet or inches, it doesn't mater here.

the size of the circle doesn't matter here either, b/c we are using the radius , that relaationship doesn't change , all circles, what ever size , have this same relationship between the radius and radians. :P this is handy.

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The diameter of a circle is 23 inches and the circle has two chords of length 14 inches what is the distance from each chord to

Svetradugi [14.3K]

Answer:

9.12 + 9.12 = 18.24 inches

Step-by-step explanation:

Diameter = 23 inches (given)

Radius = 11.5 inches

2 Chords of length = 14 inches ( You didn't specify if the 14 inches is for both chords or for a single cord. I'll assume it's for two cords 14 and 14inches apart.

To clearly solve this, we'll make some mild assumptions.

Let the perpendicular distance of the chords from the center of the circle to represented as " x and y"

Therefore:

x^2 + 7^2 = 11.5 ^ 2

x^2 + 49 = 132.25

x^2 = 132.25 - 49

x^2 = 83.25

x = √ 83.25

x = 9.12 inches

Since the cords have thesame length (Assumed from the way the question was structured, the distance would still be thesame)

y^2 + 7^2 = 11.5 ^ 2

y^2 + 49 = 132.25

y^2 = 132.25 - 49

y^2 = 83.25

y = √ 83.25

y = 9.12 inches

Therefore, the distance will be :

9.12 + 9.12 = 18.24 inches

Have fun!

6 0

3 years ago

Yuma missed 5 points out of a possible 100. What decimal number represents the part of the math test she got right.

CaHeK987 [17]

0.95

Consider this question in terms of percentages ( that is, out of 100)

she got 95 questions right → 95% = $\frac{95}{100}$ = 0.95

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2 years ago

What number would you add to both sides of x2 + 7x = 4 to complete the square?

tamaranim1 [39]

Answer: (7/2)^2

Step-by-step explanation:

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2 years ago

Read 2 more answers

Need help in this please

Alona [7]

Hmmm this is a little hard I believe c

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2 years ago

A boutique prices merchandise by adding 80%. It later decreases by 25% the price of items that do not sell quickly. Does the ord

k0ka [10]

The order you apply the adjustments does make a difference because the percents that are applied will be applied to different amount.

For example, 80% of 100 = $80. The price would be $180.

Decreasing this by 25% 25% of 180 = $45; 180-45 = $135.

25% of 100 is not the same as 25% of 180.

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2 years ago