A right triangle has acute angles measuring 2x+6

degrees and 3x−26
degrees. Use the Triangle Angle Sum Theorem to find the measures of the missing angles of the triangle.(4 points)

1 answer

In a triangle, the sum of all angles is always \(180\) degrees. Since we are given a right triangle, one angle measures \(90\) degrees, and the remaining two angles must therefore sum to \(90\) degrees.

Let the two angles be:

  1. \( \theta_1 = 2x + 6 \) degrees
  2. \( \theta_2 = 3x - 26 \) degrees

According to the Triangle Angle Sum Theorem, we have:

\[ \theta_1 + \theta_2 + 90 = 180 \]

This simplifies to:

\[ \theta_1 + \theta_2 = 90 \]

Substituting the expressions for \( \theta_1 \) and \( \theta_2 \):

\[ (2x + 6) + (3x - 26) = 90 \]

Combining like terms:

\[ 2x + 3x + 6 - 26 = 90 \]

\[ 5x - 20 = 90 \]

Now, add \(20\) to both sides:

\[ 5x = 110 \]

Next, divide by \(5\):

\[ x = 22 \]

Now we can find the measures of the angles:

  1. For \( \theta_1 = 2x + 6 \):

\[ \theta_1 = 2(22) + 6 = 44 + 6 = 50 \text{ degrees} \]

  1. For \( \theta_2 = 3x - 26 \):

\[ \theta_2 = 3(22) - 26 = 66 - 26 = 40 \text{ degrees} \]

Thus, the measures of the angles in the right triangle are:

  • One angle is \(90\) degrees (the right angle).
  • The other two angles are \(50\) degrees and \(40\) degrees.

Final answer:

  • The angles of the triangle are \(90\) degrees, \(50\) degrees, and \(40\) degrees.