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5-69.

For each diagram, write and solve an equation to determine the indicated angle measurement.

  1. Right triangle, labeled as follows: horizontal leg, 6, angle opposite horizontal leg, theta, hypotenuse, 9.

  1. Right triangle, labeled as follows: horizontal leg, 5, angle opposite vertical leg, alpha, hypotenuse, 7.

  1. Right triangle, labeled as follows: horizontal leg, 9, vertical leg, 7, angle opposite vertical, beta.