1 Answer

Walter Roman · Answer 1 · 2018-11-18T17:56:37+0000

Let the unknown angle inside the triangle = a
La = 180 - (64 + 76)
La = 180 - 140
La = 40°

Now to the k.
K is an exterior angle.
Lk + La = 180°
180° - 40° = Lk
= 140°

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