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2-41.

Halla todos los ángulos faltantes en los siguientes diagramas.  

¿Qué sabes sobre los ángulos opuestos por el vértice? ¿Y sobre los ángulos alternos internos? ¿Qué tal los ángulos adyacentes que forman una línea recta?

  1. Two vertical parallel lines cut by two transversal lines. The given angle about the point of intersection of the top transversal and the right parallel line is the interior left angle, 75 degrees. The given angle about the point of intersection of the bottom transversal and the right parallel line is the interior left angle, 85 degrees.

  1. Two horizontal parallel lines cut by two transversal lines that intersect at 1 point with the top parallel line and at two points with the bottom parallel line. The given angle about the point of intersection of the top transversals and the top parallel line is the exterior middle angle, 30 degrees. The given angle about the point of intersection of the right transversal and the bottom parallel line is the exterior right angle, 110 degrees.

Completa los valores que faltan.