Those usually mean the variable for the side length for a triangle.

Sorry that's all i know
<h3>that is in my answer</h3>
<h2>#carryonlearning:-D</h2>
Answer:
70
Step-by-step explanation:
the red lines mean the two sides are equal
so its an isosceles triangle meaning the two angles other than the 40° one are equal
the inner angles of a triangle must add up to 180
so 180-40 = 2x
140 = 2x
x = 140/2 = 70
Answer:
24 way im pretty sure
Step-by-step explanation:
The average of those two values is
(-11-4 +i+4i)/2 = -(15/2) +(5/2)i