Question

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?(1 point)
m∠1=

°
, m∠2=

°

1 answer

To solve for the measures of the angles \( m\angle 1 \) and \( m\angle 2 \), we start with the information given:

  1. \( m\angle 1 = 2x \)
  2. \( m\angle 2 = 2x + 7 \)
  3. The sum of the two angles is given as \( 135^\circ \).

We can set up the equation:

\[ m\angle 1 + m\angle 2 = 135^\circ \]

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

\[ 2x + (2x + 7) = 135 \]

Simplifying the equation:

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

Now, we will isolate \( x \) by subtracting \( 7 \) from both sides:

\[ 4x = 135 - 7 \] \[ 4x = 128 \]

Next, we divide both sides by \( 4 \):

\[ x = \frac{128}{4} \] \[ x = 32 \]

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

  1. \( m\angle 1 = 2x = 2(32) = 64^\circ \)
  2. \( m\angle 2 = 2x + 7 = 2(32) + 7 = 64 + 7 = 71^\circ \)

Thus, the measures of the angles are:

\[ m\angle 1 = 64^\circ, \quad m\angle 2 = 71^\circ \]

Final answers:

  • \( m\angle 1 = 64^\circ \)
  • \( m\angle 2 = 71^\circ \)