# Geometry problem

#### Berthin Alexander

##### New member
Find the value of "x", if ABC = 90 as shown in the graph.

I have completed some angles and found that AE = DE.
I do not know what else to do. Could you give me some ideas please.

#### lex

##### Junior Member
Can be done with some unpleasant trigonometry, but I'm sure someone can see a smart, simple geometrical solution.

#### lex

##### Junior Member
If you wish I will outline a trigonometric method, so at least you will have one method and the answer.

#### JOwen56

##### New member
The interior angles of a quadrilateral have a sum of 360 degrees. So if you can find an expression for <EDC, you can form an equation. Does that help?

#### Berthin Alexander

##### New member
The interior angles of a quadrilateral have a sum of 360 degrees. So if you can find an expression for <EDC, you can form an equation. Does that help?
I got 0=0

#### lex

##### Junior Member
There doesn't seem to have been any progress, so at least here is a trigonometric method for anyone interested. I'm sure there's a much nicer geometric method!

#### Berthin Alexander

##### New member
There doesn't seem to have been any progress, so at least here is a trigonometric method for anyone interested. I'm sure there's a much nicer geometric method!
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