Respuesta :

mac205

Step-by-step explanation:

A° + 142° = 180° (angle on a straight line is 180°)

A° = 180 - 142

A° = 38°

ADVENTUROUSBOY

ΔA = 38°

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Step-by-step explanation:

ΔA = 142° = 180° ----(angle sum property)

ΔA = 180° - 142°

ΔA = 38°

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