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144+ 18x=360
..............................
Using the intersecting chord theorem:
a x b = c x d
x+21 * 4 = x+3 * 10
Simplify:
4x+84 = 10x+30
Subtract 30 from both sides:
4x + 54 = 10x
Subtract 4x from both sides:
54 = 6x
Divide both sides by 6:
x = 9
Can you take another picture? I can't see the bottom problems.
Answer:
10 degrees
Step-by-step explanation:
take 180-170
and then 10 is your answer
you only need to try to get to 180