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5-6.

For each diagram below, set up an equation and solve for .  


  1. An irregular pentagon with sides 2 x, x minus 1, 2 x, 2 x minus 3, and x.

    Use the equation to solve for .

  1. A triangle where two of the sides each have 1 tick mark. The left side is,3 x minus 2, and the right side is, 5 x minus 14.

  1. Two adjacent angles together form a line. The angle on the left is 3 x + 20 degrees. The angle on the right is 5 x degrees.

    The two angles are supplementary angles.

  1. A triangle where two of the sides each have 1 tick mark. The base angles are,3 x + 20, and 5, x, degrees.