Answer:
β = 140 - α
we know that the "missing" angle is 40° since 40 + 140 = 180
we also know that the total sum of angles in a triangle is 180
so β = 180 - 40 - α
or β = 140 - α
Step-by-step explanation:
Answer:
The first one
Step-by-step explanation:
304,913
Answer:
3/2 or 1 1/2
Step-by-step explanation:
.
Answer:
x=15.714
y=5.715
Step-by-step explanation:
Answer:
21 units
Step-by-step explanation:
