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:
the green area stands for the safe operation space
Step-by-step explanation:
u say b×h meaning say 80degrees ×9cm which is 720..
Answer:
They are equal if that’s what you’re asking
Step-by-step explanation:
Answer:
C. 
Step-by-step explanation:
We want fg of x, so first we have to multiply f(x) times g(x).



We can cancel out an x from every term.

Let's rewind a little to get this into one of the answer choices.
is our answer.
Answer:
81
Step-by-step explanation:
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