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jok3333 [9.3K]
3 years ago
5

What is the smallest angle of rotational symmetry that maps a regular pentagon onto itself?

Mathematics
2 answers:
just olya [345]3 years ago
8 0

Consider the regular pentagon ABCDE, with center (of mass)  O.

The central angle O is a complete angle, so its measure is 360°.

It is divided into 5 equal parts, so each of them has a measure of 360°/5=72°.

If we rotate the pentagon, with point O as the center of the rotation, we can map A to any of the other points.

The smallest angle of rotation is the angle which mas A to E, 72°.

Answer: 72°

shtirl [24]3 years ago
3 0
72 degrees
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101.24 to the nearest hundredth
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Answer:

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Please help
OlgaM077 [116]
First, we're going to see the candies per minute that machine C packs.
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Now that we know that machine C packs 75 candies per minute, we're going to multiply the candies machine C makes by 11 minutes.
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4 0
3 years ago
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PLEAES HELP ME I SUCK AT MATH!!
ehidna [41]

Answer:

its 5

Step-by-step explanation:

4 0
3 years ago
Can someone please help
Leona [35]

Answer:

each hamburger costs $3.50

Step-by-step explanation:

he spent $13 in total and bought one hot dog for $2.50 and 3 hamburgers but we don't know the price of one hamburger so we could represent it by the equaton,

2.50 + 3h = 13 now solve for x

-2.50           2.50

3h = 10.50

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check:

2.50+3(3.50)=13

2.50+10.50=13

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3 years ago
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