Can anyone do this quickly?

4th option (x = 60)

Step-by-step explanation:

This is isosceles triangle so the angles are the same. Think of this as an mirror. AE is the same as BE so you can assume angle ABE is 30 degrees.

30+30=60

180-60=120

So angle AEB is 120.

That is supplementary angle so the other side must be 180-120=60.

So, the middle smaller triangle is isosceles as well, so BED and BDE are both 60.

60+60=120, 180-120=60

So angle x = 60

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2