Answer:
80 degrees
Step-by-step explanation:
Sum of the interior angles of a triangle = 180
a + 50 + 50 = 180
a = 80
Separating variables, we have

Integrate both sides.


Given that
, we find

Then the particular solution is



and because
, we take the negative solution to accommodate this initial value.

Answer: 2,3, and the last one.... I think
Step-by-step explanation:
Sorry I’m not sure but maybe you could look it up???
I think it only surrounds 1 meter because it’s a meter long