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dusya [7]
3 years ago
5

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

Mathematics
1 answer:
lora16 [44]3 years ago
4 0

Answer:

72º

Step-by-step explanation:

In order to calculate this you have to remember that the center angle of any polygon measures 360º, so what we do is just divide those 360 by the number of angles that you will find in the polygon, the number of angles equals the number of sides, so the pentagon has 5 sides, it will also have 5 angles. So we just divide the 360/5=72

So the smallest angle of rotational symmetry that maps a regular pentagon onto itself will be 72º

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The temperature, t, in degrees celsius, in a warehouse changes according to the function t(h) = 18 + 4sin(pi/12 (x = 8)).
egoroff_w [7]

The rate at which the temperature is changing at 9 a.m. is 19.03 degrees Celsius per hour

<h3>How to determine the rate at 9a.m?</h3>

The function is given as:

t(h) = 18 + 4\sin(\pi/12(x - 8))

9a.m is 9 hours since midnight.

This means that

x = 9

So, we have:

t(h) = 18 + 4\sin(\pi/12(9 - 8))

Evaluate

t(h) = 18 + 4\sin(0.262)

Evaluate the expression

t(h) = 19.03

Hence, the rate at which the temperature is changing at 9 a.m. is 19.03 degrees Celsius per hour

Read more about rates at:

brainly.com/question/25545513

#SPJ1

5 0
2 years ago
Read 2 more answers
(a^2-4a+6)+(3a^2+13a-1) finding the sum of the difference
andreev551 [17]
(a² - 4a + 6) + (3a² + 13 - 1)
= a² + 3a² - 4a + 13a + 6 - 1
= 4a² + 9a + 5

Hope this helps! :)
5 0
4 years ago
SOMEONE HELP ME PLEASE
N76 [4]

Answer:

you did not provide the numbers to answer any question...

but the formula that you want is probably this one

Combination Formula nCr=n!(n−r)!r!

Step-by-step explanation:

4 0
3 years ago
Please help asap. due today
Ksivusya [100]

Answer:

ASA

Step-by-step explanation:

∠BAC ≈ ∠CAD

AC = AC

∠BCA ≈ ∠ACD

5 0
3 years ago
Please help will mark the correct one brainiest.
lorasvet [3.4K]

Answer:

you can fill 6 and a half vials

Step-by-step explanation:

13//2=6.5

4 0
3 years ago
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