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rewona [7]
3 years ago
12

Can someone explain why the answer is D? i don't get how to do this :')

Mathematics
1 answer:
Elodia [21]3 years ago
4 0

Join JH and KH.

You did that so you could measure or calculate the size of <JHK. There are 5 such central angles in a pentagon. If you drew a little circle with H as the center and you went around the circle once, you would have traveled 360 degrees. So <JHK = 360/5 = 72. Make sure you understand that before you read on.

Ok here's the trick. 144 = 2*72. That means that when you rotate the pentagon, you rotate it through Two central angles.

What will happen is that Point J will wind up at Point L and Point K will sit where N is right now. All the points not mentioned will do the same thing. They will move two points clockwise.

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Let y = the distance between the top left corner and the bottom right corner

y^2 = 24^2 + 15^2

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y = 3 * sqrt(89)

Now we can find x.

12^2 + x^2 = (3 * sqrt(89))^2

x^2 = 657

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7 0
3 years ago
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n

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y

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−

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y

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−

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6 0
3 years ago
Ranjita types 1080 words in one hour. What is her gross words a minute rate? (a) 15 (b) 16 (c) 18 (d) none of these
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5 0
3 years ago
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mezya [45]
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6 0
3 years ago
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ale4655 [162]

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7 0
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