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3-63.

Use the geometric relationships in the diagrams below to solve for .

  1. A triangle with two equal sides.  A base angle is labeled x. 82 degrees is the angle between the two equal sides.

    This is an isosceles triangle. Are there any special qualities about isosceles triangles that you know?

    Base angles in an isosceles triangles are congruent.

    then take
    .
    Both base angles will be .

  1. A triangle with two equal sides.  A base angle is labeled 71 degrees. The angle between the two equal sides is, x.

    Both base angles are . See part (a) for help.