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Home > INT2 > Chapter 1 > Lesson 1.3.3 > Problem 1-99

1-99.

Calculate all the missing angle measures in the diagrams below.

  1. 2 increasing lines, each labeled with 2 arrows, are crossed by a horizontal line, & a decreasing line. Top right intersection, interior left angle, labeled 75 degrees. Bottom right intersection, interior left angle, labeled 85 degrees.

    Angle labels, in degrees, added as follows to each intersection, starting at top left, & going clockwise: top left, & top right intersections: 105, 75, 105, 75. bottom left & bottom right intersections: 85, 95, 85, 95.

  1. 2 horizontal parallel lines, crosses by 2 transversals, 1 increasing, 1 decreasing, the transversals intersect with the top parallel line. Top intersection, angle between the 2 transversals, labeled 30 degrees. Bottom right intersection, interior right angle, labeled 110 degrees.

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