The answer is C) 160.
We know this because if mA = 50, we know that mC must also be 50. This is due to the fact that AB = BC. This leaves us with mB as 80 since the angles of a triangle always have to equal 180.
Now knowing this, it is easy to find the arc lengths in degrees. When you have a transcribed triangle, all we are going to do here is double the angle of the triangle to get the arc measure.
mB = 80
80*2 = 160
Answer:
2nd
Step-by-step explanation:
using the quadric formula

do the math and you get the second one.
{-1/3,5/2}
A (-12,-8), B(6,-3), C(3,3)
D is the answer. Hope this helped.