Two adjacent angles, ∠1 and ∠2 , form a resulting angle with measure 135° . If m∠1=(2x)° and m∠2=(2x+7)° , what are the two unknown angle measures? m∠1= __° , m∠2= __°

1 answer

To find the measures of the angles ∠1 and ∠2, we start with the information given:

  1. The resulting angle formed by ∠1 and ∠2 is \( 135° \).
  2. The measures of the angles are given by: \[ m∠1 = (2x)° \quad \text{and} \quad m∠2 = (2x + 7)° \]

Since ∠1 and ∠2 are adjacent angles that form a resulting angle of \( 135° \), we can write the equation:

\[ m∠1 + m∠2 = 135° \]

Substituting the expressions for \( m∠1 \) and \( m∠2 \):

\[ (2x) + (2x + 7) = 135° \]

Now, simplify the equation:

\[ 2x + 2x + 7 = 135° \] \[ 4x + 7 = 135° \]

Next, subtract 7 from both sides:

\[ 4x = 135° - 7° \] \[ 4x = 128° \]

Now, divide by 4:

\[ x = \frac{128°}{4} = 32° \]

Now that we have \( x \), we can find the measures of the angles.

Calculate \( m∠1 \):

\[ m∠1 = 2x = 2(32°) = 64° \]

Calculate \( m∠2 \):

\[ m∠2 = 2x + 7 = 2(32°) + 7 = 64° + 7° = 71° \]

Thus, the measures of the two angles are:

\[ m∠1 = 64° \quad \text{and} \quad m∠2 = 71° \]

Final answers:

\[ m∠1 = 64° , \quad m∠2 = 71° \]