Answer:
ITS C, 35 DEGREES
Explanation:
Fast answer, but its 73 plus 51 plus 21 which is 145 then u subtract 145 from 180, leading to 35.
x = 35
The angles of the large triangle add to 180
73+ 51+ (x+21) = 180
Combine like terms
145 +x = 180
Subtract 145 from each side
145+x-145= 180-145
x =35
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