Math Problem Statement
Solution
In this problem, we have two parallel lines, , and a transversal line that intersects both of these parallel lines. We are tasked with finding the values of and based on the angles provided.
Step-by-Step Solution:
1. Identifying angle relationships:
- The 85° angle and angle are alternate interior angles because and is a transversal. Alternate interior angles are congruent when lines are parallel, so:
2. Solving for :
- The angle is supplementary to the angle (since these two form a straight line on the same side of the transversal ). Supplementary angles add up to 180°, so: Substituting : Simplifying:
Final Answers:
Would you like more details on any of these steps, or do you have any questions?
5 Related Questions:
- What are alternate interior angles, and how are they used in geometry?
- How do you determine if two angles are supplementary?
- What are corresponding angles, and how do they differ from alternate interior angles?
- Can we always use the same reasoning for angles when the lines are not parallel?
- How do transversal lines affect angle relationships?
Tip:
When working with parallel lines and a transversal, always look for angle relationships like alternate interior angles or corresponding angles. These can greatly simplify solving for unknowns!
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Math Problem Analysis
Mathematical Concepts
Parallel Lines
Transversal
Alternate Interior Angles
Supplementary Angles
Formulas
Alternate interior angles are congruent when lines are parallel
Supplementary angles add up to 180°
Theorems
Alternate Interior Angles Theorem
Supplementary Angles Theorem
Suitable Grade Level
Grades 7-9