Hi, i would be verry happy if someone could help me with this tasks. Its number 5 i cant figure out.

AB=AC, AD=AE, BAD=30 degree , what is the angel x?

So plz help. zorry for my bad english...

thanks /Jonas

Results 1 to 4 of 4

- February 23rd 2009, 05:14 AM #1

- Joined
- Feb 2009
- Posts
- 2

- February 23rd 2009, 06:50 AM #2

- Joined
- Dec 2008
- Posts
- 152

- February 23rd 2009, 07:57 AM #3

- Joined
- May 2006
- From
- Lexington, MA (USA)
- Posts
- 11,713
- Thanks
- 633

Hello, J0naz!

I have a solution, but I'm sure someone will find a shorter one.

Given: .

Find: .Code:A o * * * * 30° * * * * * * * * E * * α o * * * * * θ *α * x * B o * * * * * * * o * * * o C D

Since is isosceles,

In

. . Hence: . .[1]

In

. . Hence: .

In isosceles triangle

Then: . .[2]

At vertex , we have: .

Substitute [1] and [2]: .

. . Therefore: .

- February 23rd 2009, 10:45 AM #4

- Joined
- Feb 2009
- Posts
- 2

## ok,

thank you guys for the help.

But i think unforturnally this one was a little bit over my skill.

I understand your explanation in the beginning, but then its to mutch for me. I have just started the math course so hopfully i will understand it later on.

But thank you for your time anyway, maybe I come back another day with new questions.

Have a nice day

/Jonas