Question

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Answer 1

All interior angles of triangle add up to a sum of 180.
39+25=64
180-64=116
180-116=64
64+15=79
180-79=101

X=101

Answer 2

Answer:

sum of all angles =180

15° + 25° +(39+x) =180°

40° + 39 +x = 180

79° +x =180

x = 180 - 79

x. = 101

complete angel = 39 +x

= 39 + 101

= 140