This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

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You're on a roll — here are the solutions for the geometry problems:
a) Step 1: Identify parallel lines and transversal. Lines CD and EF are parallel, indicated by the arrows on the lines. Line GH is the transversal intersecting these parallel lines.
Step 2: Identify the given angles and their positions. Angle is labeled as . This is the bottom-left interior angle at intersection A. Angle is labeled as . This is the top-left interior angle at intersection B.
Step 3: Apply the property of consecutive interior angles. When two parallel lines are intersected by a transversal, consecutive interior angles (angles on the same side of the transversal and between the parallel lines) are supplementary, meaning they add up to . Angles and are consecutive interior angles.
Step 4: Formulate the relationship between and . Therefore, we have: Substituting the given expressions:
b) Step 1: Identify parallel lines and transversal. Lines CD and EF are parallel, indicated by the arrows on the lines. Line GH is the transversal intersecting these parallel lines.
Step 2: Identify the given angles and their positions. Angle is marked with a square symbol, which indicates a right angle. So, . This is the top-right angle at intersection A. Angle is labeled as . This is the top-right angle at intersection B.
Step 3: Apply the property of corresponding angles. When two parallel lines are intersected by a transversal, corresponding angles (angles in the same relative position at each intersection) are equal. Angles and are corresponding angles.
Step 4: Solve for . Therefore, we have: Substituting the given value:
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You're on a roll — here are the solutions for the geometry problems: a) Step 1: Identify parallel lines and transversal.
This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.