# Finding an angle with Picture

#### hvidales

1. Homework Statement

2. Homework Equations

3. The Attempt at a Solution So angle 1 was giving and through that they found angle 2. I need help on how they found angle 2. The dark red arrow is a vector. This is a physics problem asking for something else but I got stuck here lol.
1. Homework Statement

2. Homework Equations

3. The Attempt at a Solution
1. Homework Statement

2. Homework Equations

3. The Attempt at a Solution

Last edited:
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#### azizlwl

Add another line parallel to ground intersect x-y origin.

#### ehild

Homework Helper
The angles are congruent as their arms are pairwise perpendicular. The red vector is vertical, makes a right angle with the horizontal arm of angle 1. The other arm of angle 2 is perpendicular to the slope which is the other arm of angle 1. See picture: β=90-(90-α)=α.

ehild

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#### hvidales

What happend with the x axis? I updated the picture to look better.

[url=http://postimage.org/][PLAIN]http://s17.postimage.org/h2qbp828v/Untitled.png[/url][/PLAIN]