This math topic focuses on calculating the complementary angles to make a total of 180 degrees, which is pertinent to the study of intersecting, parallel, and perpendicular lines in geometry. Students are given one angle and must determine the measure of the other angle to complete 180 degrees. The topic features multiple-choice questions where the possible answers are listed, and learners must choose the correct one that sums up to 180 degrees with the given angle.

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