BEG is a triangle. ABC and DEF are parallel lines. work out the size of angle x.

Step-by-step explanation:

The picture of the question in the attached figure

step 1

Find the measure of angle BEG

we know that

---->  by supplementary angles (form a linear pair)

substitute the given values

step 2

Find the measure of angle HBC

we know that

---> by supplementary angles (form a linear pair)

we know that

---> by corresponding angles

substitute

step 3

Find the measure of angle EBG

we know that

substitute the given values

step 4

Find the measure of angle x

we know that

The sum of the interior angles in any triangle must be equal to 180 degrees

so

In the triangle BEG

substitute the given values

answer: the dogs need to shift their focus to human scent.

its because the dogs being trained are for search and rescue thus they need to be able to track humans and their specific scent

it would be:

c.parallelogram.