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3 years ago

What is the smallest degree of rotation that will map a regular 18-gon onto itself?

2 answers:

6 0

Because the 18-gon is symmetrical, you can rotate it by 360/18 or 20 degrees. This is because when you rotate it by 20 degrees(to the left for explanation matters), any angle will now be in the position of its angle to its left.

neonofarm [45]3 years ago

3 0

Answer:

The answer is 20

Step-by-step explanation:

360 will be divided by 18 which will give you 20. For those of you who had the same question but instead of "18-gon" you had "20-gon" if you divide 360 by 20 your answer will be 18.

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Ms. Banerjee bought a car for $22,500. The amount she paid for her new car was twice the amount she paid for her previous car, w

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Answer:

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3 years ago

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Describe, in your own words, the identity sin^2(x) + cos^2(x) = 1.

Crank

Look at the attached figure. We define the unit circle as a circle with center $A$ in the origin (0,0) and radius 1.

Then, we consider a point P on the circumference. We call $\alpha$ the angle between the positive half of the x axis and the radius AP.

We define

$\cos(\alpha) = \overline{AD},\quad \sin(\alpha) = \overline{AC}$

As you can see, ACD is a right triangle, and so we have

$\overline{AD}^2+\overline{AC}^2=\overline{AP}^2$

But since we know that AD is the cosine, AC is the sine, and AP is the radius (which is 1, and remains 1 when squared), we have just found out that

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3 years ago

What's 23 x 5/8 I need help

vitfil [10]

14 3/8
Hope that helps you!

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3 years ago

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Mr. Reich travels to and from work 5 days each week. If he drives his car, his weekly costs are $96 for gasoline, $19 for tolls

timofeeve [1]

It’s cheaper to take this bus. Compare 166 to 190

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3 years ago

If 6 people want to share a 30 pound bag of beans equally by weight how many pounds of beans should each person get? Between wha

sertanlavr [38]

Answer:

The 6 people would each get 5lb. of beans. 5 lies between 4 and 6.

Step-by-step explanation:

To get the answer to this problem, all you have to do is divide the total pounds of beans by how many people there are. 30 ÷ 6= 5, so each person would get 5 pounds. Since 5 comes between 4 & 6, you can use that as your answer.

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3 years ago