Question

In the diagram <4 = <40 °. Find the measure of <3 = (?)°​

Answer 1

∠3=140°

Explanation:

∠4 = 40°

∠3 + ∠4 = 180° (co-exterior angles are equal)

∠3 + 40° = 180°

∠3 = 180° - 40°

∠3 = 140°

`or^{}`

∠2 = ∠4 = 40° (corresponding angles)

∠3 + ∠2 = 180° (linear pair)

∠3 + 40° = 180°

∠3 = 180° - 40°

∠3 = 140°

hope you understood