This math topic focuses on solving for angles, specifically within diagrams of pentagonal star arms. It is a part of the broader study of geometry involving intersecting, parallel, and perpendicular lines. Each of the seven questions presents a unique problem requiring the calculation of a specific angle labeled 'X' in given diagrams. Multiple-choice answers are provided for each question, suggesting the need for either application of angle properties or measurement techniques related to intersecting and parallel lines within geometric shapes.