Interior angles of a regular polygon

[Mathisconfusing101]

How do you find the measure of an interior angle?

I have two different problems on this.

Thanks for the help!

 

[stapel]

How do you find the measure of an interior angle?

The methods used will vary with the information provided.

Please post the full and exact text of the exercise(s), the complete instructions, and a clear listing of everything you have tried so far. If you are unable to get started, please specify the subject(s) on which you are seeking links to lessons.

Thank you.

Eliz.

 

[Mathisconfusing101]

thanks

First of all let me say thank you for responding. You are saving my graduation... I was begining to lose hope that anyone would reply..

I am looking at a trapezoid JKMN
like this (since i can't get a figure here)

j k
n m

j = (2x + 15) degrees
k (3x-20) degrees
m= x degrees
n = (x+15) degrees

The problem is asking for me to find the measure of each interior angle using the given information.

I have tried to add all of the angles together and set it equal to 360, but I can not get the math to add up right. But I am not that great with math... so I'm sure I am doing something wrong. I am using geometryonline.com
because that is what was in my textbook, but I still am not getting anywhere.

Thank you again for your help.

 

[stapel]

I was begining to lose hope that anyone would reply.

You received a reply about half an hour after posting. Please note that there is no paid staff waiting on-hand to provide instant answers; the tutors here are volunteers who surf by and help as they are able. If you are needing on-demand guaranteed replies, then a free online forum is probably not the best place to be. On free services such as this, posters should expect to wait hours, if not days, for a reply.

Thank you for your consideration.

I am looking at a trapezoid JKMN

j = (2x + 15) degrees
k (3x-20) degrees
m= x degrees
n = (x+15) degrees

I will assume that, contrary to standard mathematical practice, you mean the lower-case and upper-case letters to actually mean the same thing.

Hint: What is the angle-sum of any quadrilateral?

I have tried...but I can not get the math to add up right.

The reason this forum's "Read Before Posting!!" message directed you to show your work is that we cannot find errors we cannot see.

Please reply showing all of your work and reasoning. Thank you.

Eliz.

 

[Mathisconfusing101]

.

I understand that this is a free site... that is why I am here... I am a student in high school.. money is not something i have...

Thank you for taking the time to help.

There is no work really, because I don't know what I am doing...

sry bout the upper and lower case things... but i did say that I was horrible about math.

Basically what I did was exactly what I said in the previous reply

I added all the angles together

2x+15+3x-20+x+15+x

This gave me 7x+10
but then what?

 

[Denis]

Re: .

I added all the angles together
2x+15+3x-20+x+15+x
This gave me 7x+10
but then what?

Correct...
You should know that the sum of angles inside any quadrilateral = 360
(like sum of angles inside any triangle = 180).
SO : 7x + 10 = 360

You ok now?