A straight angle is equal to 180 degrees. 180-80=100. 100-60=40. so y=40. vertical angles are congruent so x=40 degrees.
The Solution are : a=3.
b=1.
Hope this helps! I can resubmit if my hand writing is too bad.
Answer:
D
Step-by-step explanation:
every 2 sides of a triangle has to be bigger than the 3rd side
1/5 is 2% or 0.2, therefor 2/5 is 4% or 0.4
