Answer:
60 degrees
Step-by-step explanation:
sum of angles at a point = 360
there are 6 angles so
360/6= 60
The equations
and
are really the same, we're just setting , or .
So we get
b equals 20
b - 13 = 7
7 + 13 = b
7 + 13 = 20
great :) wbu
Is that the whole question or....