Compute all angles of each of the figures below:

Let us name the vertices of the triangle.

∠ ABC + ∠ ABD = 180°
⇒ ∠ ABC + 145° = 180°
⇒ ∠ ABC = 180° - 145°
⇒ ∠ ABC = 35°
In Δ ABC,
∠ A + ∠ B + ∠ C = 180°
⇒ ∠ A + 35° + 70° = 180°
⇒ ∠ A + 105° = 180°
⇒ ∠ A = 180° - 105°
⇒ ∠ A = 75°
∠ CAF + ∠ CAB = 180°
⇒ ∠ CAF + 75° = 180°
⇒ ∠ CAF = 180° - 75°
⇒ ∠ CAF = 105°
∠ BCE + ∠ BCA = 180°
⇒ ∠ BCE + 70° = 180°
⇒ ∠ BCE = 180° - 70°
⇒ ∠ BCE = 110°
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