This math topic focuses on solving for unknown angles in rectangles that have crossing lines, offering a fundamental introduction to problem-solving with 2D polygons. Each question provides a different geometric shape with lines intersecting within the rectangle, and viewers must ascertain the magnitude of a specified angle. Multiple-choice answers accompany each graphical representation, challenging the user to apply their knowledge of geometric properties and relationships within polygons and intersecting lines to find the correct angle measurement.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.