1. Parallel Lines and Transversals
Sign In
Use the relationship of angles between parallel lines.
Angle Measure: 63^(∘)
Explanation: See solution.
To find the measure of ∠ 1, we will use the fact that corresponding angles of parallel lines are congruent. Since ∠ 1 and the 63^(∘) angle are corresponding angles and lines l and m are parallel, these angles are congruent.
Congruent angles have the same measure, so the measure of ∠ 1 is 63^(∘).