Math Problem Statement
use auxiliary line
Solution
In the image, we have a set of angles formed by intersecting lines. We're asked to solve for , and using an auxiliary line can help clarify the relationships between the angles.
Step-by-step solution:
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Identify angle relationships:
- The two angles 62° and are vertically opposite angles because they are on opposite sides of the intersection of the two lines. Thus: because vertically opposite angles are always equal.
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Angle sum at a point: We can also check this by considering that the sum of angles around a straight line is 180°. The angle marked as 144° and the angle at the intersection of the lines (complementary to ) form a linear pair. This means: Solving this gives: However, this is not relevant for the vertically opposite angle case.
Thus, the correct measure of is 62° based on the vertical angles theorem.
Do you want further details or have any questions?
Here are 5 related questions for more practice:
- If another angle on the same diagram measures 118°, what is its vertically opposite angle?
- How do you identify vertically opposite angles in more complex diagrams?
- Can you find all angles formed by two intersecting lines if one angle is given?
- What is the sum of all interior angles around a point where multiple lines meet?
- If you are given two angles in a triangle, how do you find the third angle?
Tip: Vertically opposite angles are always equal whenever two lines intersect, regardless of the diagram complexity.
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Math Problem Analysis
Mathematical Concepts
Geometry
Angles
Vertically Opposite Angles
Linear Pairs
Formulas
Vertically opposite angles: Opposite angles formed by intersecting lines are equal.
Linear pair: The sum of angles on a straight line equals 180°.
Theorems
Vertical Angles Theorem
Angle Sum of a Straight Line
Suitable Grade Level
Grades 7-9
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