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

∠3=140°

Step-by-step explanation:

∠4 = 40°

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

∠3 + 40° = 180°

∠3 = 180° - 40°

∠3 = 140°

∠2 = ∠4 = 40° (corresponding angles)

∠3 + ∠2 = 180° (linear pair)

∠3 + 40° = 180°

∠3 = 180° - 40°

∠3 = 140°

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step-by-step explanation:

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