Question

Right?

Answer 1

right?

Answer 2

Correct.

Answer 3

correct! :)

Answer 4

Unfortunately, no

In triangle ABC, we have the hypotenuse = 10 and the shortest side = 5
that makes the angle opposite the shortest side what?

In a right triangle with equal legs, we have an isosceles triangle (two sides are equal). That means the two angles are equal. All 3 angles in the triangle add up to 180. One is 90.
that leaves 90 for the other two. they are equal. what is angle x?

If you can answer that, you are half way to answering the question. You also need to memorize the sin,cos, tan of certain "special" angles: 0,30,45,60 and 90.

Answer 5

angle x is 30 ?

Answer 6

Try this
http://www.khanacademy.org/math/geometry/triangles/v/45-45-90-triangles

Answer 7

ohhh duh. 45.. wait. then what do i do?

Answer 8

now you need to know what is y? If you watch the video (and the one after it) you would find out is must be 30 degrees

Now you need check the choices
cos(45) and 2*tan(30)

see
http://www.math.uwo.ca/~rnbryan/trig%20notes/P3trig.pdf