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

Answer:
10.15
Step-by-step explanation:
Subtract:
10.15 - 10.1 = 0.05
10.15 is greater than 10.1 by 0.05
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But this is not a question. proof? no question mark
Answer:
HOW ON THE WORLD WE SUPPOSED TO ANSWER DIS ?!?!?!
Step-by-step explanation: