Question

in the figure below, $m\angle 2 = 103^\circ$. find $m\angle 1$.
$m\angle 1 = \square^\circ$

Explanation:

Step1: Identify angle relationship

∠1 and ∠2 are supplementary (form a straight line), so \( m\angle1 + m\angle2 = 180^\circ \).

Step2: Solve for \( m\angle1 \)

Substitute \( m\angle2 = 103^\circ \) into the equation: \( m\angle1 = 180^\circ - 103^\circ \).
Calculate: \( 180 - 103 = 77 \).

Answer:

\( m\angle1 = 77^\circ \)