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AnnyKZ [126]
3 years ago
13

The size of the interior angle of a regular decagon...Need an answer ASAP

Mathematics
2 answers:
loris [4]3 years ago
7 0

Step-by-step explanation:

The exterior angle of a regular n-sided polygon is given by

Exterior angle = 360/n  

The interior angle is therefore the supplement of the exterior angle,

Interior angle = 180 - 360/n

for n=10, decagon,

Interior angle of a decagon = 180 - 360/10 = 180-36 = 144 degrees

olga nikolaevna [1]3 years ago
5 0

Answer:

144

Step-by-step explanation:

x = ((n-2)π / n) radians = (((n-2)/n) x 180° ) degrees

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If the difference between a number and 21 is divided by2, the result is 4 times the number. What is the number
Ostrovityanka [42]
(n-21)/2=4n is the equation

First, divide what is in the parentheses by 2
0.5n-10.5=4n

Then, multiply the whole equation by 2 so we have all whole numbers
n-21=8n

Move N so that it is with 8n
7n=-21

Divide 21 by 7
n=-3

Solution: The number (n) is equal to -3
6 0
3 years ago
The distance between Taylor’s house and her school is 300,000 centimeters.
Sergio [31]

Answer:

30 km

Step-by-step explanation:

1 kilometer = 100 meters.

1 meter = 100 cm

therefore, 1 km = 10,000

and then, 300000 cm is 30 km

7 0
3 years ago
What is 3. 2/15 simplified
coldgirl [10]
Hi there!

Okay, so I was a bit confused by your question, but I tried to make it a bit easier and work out.

There was two ways I did this because I didn't want to NOT answer your question!

What about this:

3.2/15 cannot be simplified lower than what it is. Decimal form is 0.2133333 (repeating). I answered this part because I didn't know what 3. was (I at first thought it was part of the numerator. But now that I look at it again it may have been a question number. But just in case, I answered it like this anyway.)

Next!

I solved 2/15, which also cannot be simplified down lower than what it is. It's decimal form is 0.133333 (another repeating decimal.)

And so as you can see I answered two problems for you. If these are incorrect, let me know!

Hope this helps!
7 0
3 years ago
What does 10^2-2(10+5) equal
Nookie1986 [14]

Answer:70

Step-by-step explanation:

10^2 =100

-2(10+15) = -2(15)=-30

100-30= 70

4 0
2 years ago
Rewrite using distributive property. 7(2x + 6y)
GenaCL600 [577]

Answer:

14x+42y

Step-by-step explanation:

7(2x+6y)

14x+42y

6 0
2 years ago
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