# Finding an angle

1. Jun 28, 2012

### hvidales

1. The problem statement, all variables and given/known data
Find angle B

2. Relevant equations
Triangle makes 180 degrees

3. The attempt at a solution
I brought the red vector(Red Vector was given) down more to make a right triangle and got 55 degrees for C. I do not know where to go from there though to get angle B. Angle B is also 35 degrees but I don't know how they got that.

[url=http://postimage.org/][PLAIN]http://s17.postimage.org/6onxtnlbz/Untitled.png[/url][/PLAIN]

Last edited by a moderator: Jun 28, 2012
2. Jun 28, 2012

### eumyang

The line labeled "x" is parallel to the slope incline. The lines labeled "x" and "y" are presumably perpendicular. You should be able to take it from there.

Last edited: Jun 28, 2012
3. Jun 28, 2012

### SammyS

Staff Emeritus
What angle does the x-axis make with the y-axis ?

Last edited by a moderator: Jun 28, 2012
4. Jun 28, 2012

### hvidales

90 degrees

5. Jun 28, 2012

### SammyS

Staff Emeritus
Then, what is the sum of (angle B) + (angle C) ?

6. Jun 28, 2012

### hvidales

would it be 90 too? I also had another question, the angle where B is at, is that whole piece a another right triangle?

7. Jun 29, 2012

### eumyang

See attachment. I labeled another angle, D, in blue. Given that the line labeled "x" and the slope incline are parallel, what can you say about angles C and D?

#### Attached Files:

• ###### Incline.png
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8. Jun 29, 2012

### hvidales

Are they equal to each other?

9. Jun 29, 2012

### eumyang

Yes.

10. Jun 29, 2012

### hvidales

oh so these are two parallel lines cut by a transveral right?

11. Jun 29, 2012

Again, yes.