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bulgar [2K]
2 years ago
13

What is the exact circumference of a circle with a radius of 12 inches?

Mathematics
1 answer:
Mamont248 [21]2 years ago
5 0
It’s 75.4 , I’m not sure abt those answers up there
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I rlly need some help please if ur big brains im going to be asking multiple questions right now
Lynna [10]

You can break the shape up into a rectangle and a right triangle.

Use your trig ratios to find the missing sides.

Add all the sides up and you have your perimeter!

//

p = 2(l) + 2(w)

p = 2(10)  + 2(4)

p = 28

//

tan =  \frac{opp}{adj}

\tan(45) =  \frac{10}{adj}

adj =  \frac{10}{ \tan(45) }

adj = 10

{a}^{2}  +  {b}^{2}  =  {c}^{2}

{10}^{2}  + 10 {}^{2}  =  {200}^{2}

\sqrt{200} = 14.14213562

//

p = 10 + 4 + (4 + 10) + 14.14213562

<em>*notice how one of the 10 is left out because it is inside the shape so we can't use that to find perimeter.</em>

p = 42.14

3 0
2 years ago
Hi Help me with question 6b) pls
Romashka-Z-Leto [24]

Answer:

k = 9

Step-by-step explanation:

Consider the pattern on the right side , that is

T_{k} = k(k + 2) + 1 = k² + 2k + 1

Equating

k² + 2k + 1 = 100 ( subtract 100 from both sides )

k² + 2k - 99 = 0 ← in standard form

(k + 11)(k - 9) = 0 ← in factored form

Equate each factor to zero and solve for k

k + 11 = 0 ⇒ k = - 11

k - 9 = 0 ⇒ k = 9

But k > 0 , then k = 9

5 0
2 years ago
Geometry and I need help
Yanka [14]

Answer:

y = 11

Step-by-step explanation:

We use the definition of Supplementary Angles and Adjacent Angles.

Step 1: Set up equation 1 (Definition of Supplementary Angles)

5x - 4 +7x - 8 = 180

Step 2: Solve for <em>x</em>

12x - 4 - 8 = 180

12x - 12 = 180

12x = 192

x = 16

Step 3: Plug in <em>x</em>

5(16) - 4

80 - 4

76°

Step 4: Set up equation 2 (Definition of Supplementary Angles)

76 + 9y + 5 = 180

Step 5: Solve for <em>y</em>

9y + 81 = 180

9y = 99

y = 11

3 0
2 years ago
Read 2 more answers
−3, −1, 0, 3<br><br> Which pair of numbers has a sum of 0
Artemon [7]
-3 and 3 are equal to 0
3 0
3 years ago
Which graph shows a polynomial function with an even degree?
worty [1.4K]

Answer:

I am on the same one and I think it is C

Step-by-step explanation:

I am not entirely positive but I am leaning towards this one.

3 0
2 years ago
Read 2 more answers
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