In the given figure, find the values of x, y, z, s and m.

Given that ∠A = 40°
(i) ∠DAB + ∠ABC = 180° (adjacent angles)
⇒ 40° + ∠ABC = 180°
⇒ ∠ABC = 180° – 40° = 140°
Hence, ∠x = 140°
(ii) ∠x + ∠y = 180° (adjacent angles)
⇒ 140° + ∠y = 180°
⇒ ∠y = 180° – 140° = 40°
Hence, ∠y = 40°
(iii) ∠y + ∠z – 180° (adjacent angles)
⇒ 40° + ∠z = 180°
⇒ ∠z = 180° – 40° = 140°
Hence, ∠z = 140°
(iv) ∠x + ∠s = 180° (straight angles)
⇒ 140° + ∠s = 180°
⇒ ∠s = 180° – 140° = 40°
Hence, ∠s = 40°
(v) ∠m + ∠z = 180° (straight angles)
⇒ ∠m + 140° = 180°
⇒ ∠m = 180° – 140° = 40°