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anyanavicka [17]
3 years ago
10

A regular pentagon (5 sides) is rotated about its center. By which angle could the pentagon be rotated so that it is mapped onto

itself?
A
45 degrees

B
60 degrees

C
72 degrees

D
90 degrees
Mathematics
1 answer:
Marizza181 [45]3 years ago
7 0

Answer: Your answer is C, 72 degrees.

Step-by-step explanation:

A pentagon is a polygon with 5 vertices. A polygon can be rotated 360 degrees in total. Since this shape has 5 vertices, it can be rotated on every vertex to get the same figure, or in other words, it being mapped onto itself. Therefore, 360 degrees divided by 5 vertices is 72 degrees.

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Answer:

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Step-by-step explanation:

1. AB + BC = AC so 26 + (10 - 3x) = 14x +2 and then add 3x to both sides and subtract 2 from both sides to get x on one side and an integer on the other side which is 34 = 17x and then divide 17 from both sides to get x = 2 and then substitute x into the AC and AB equations to find the values its equal to.

2. The symbol in the given means that the two lengths are congruent which means they are equal to each other so you put the two equations equal to each other and solve for y. 9y -2 = 14 + 5y, so subtract 5y from both sides and add two to both sides to get 4y = 16 and then divide both sides by 4 to get y = 4 and then substitute in the answer to find the lengths of AB and BC.

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3 years ago
Evaluate the integral. (3 + 1/4 u^4 − 2/3 u^9) du
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Now we square 2 and 7 and add them together to get 4 + 49 = 53.

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Some people prefer you right it as a point (5,0).

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Just like to find the y-intercept you can set x=0 and solve for y.

Let's find the x-intercept.

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