Answer:
x = 8 degree
Step-by-step explanation:
8x - 4 = 60 degree (being alternate interior angle)
8x = 60 + 4
8x = 64
x = 64/8
x = 8 degree
Triangle has 3 angles, A, B, C. The total interior angle of a triangle is 180.
180 = A + B + C
180 = 72 + B + 113
180 = B + 185
B = 180 - 185
B = -5
This only proves that the figure is not a triangle because angle B is negative.
First we find the measurement of dark dot .
ANd for that we have to use the formula of the angle formed by the intersection of chord .
Let the dark dot be t.
So we have

t and z are linear pair and sum of angles of linear pair =180 degree.
So we get

noooo
Step-by-step explanation:
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