This math topic focuses on the geometry of circles, specifically involving calculations related to the lengths of tangent lines drawn from an external point to a circle. By solving problems requiring the determination of these lengths, known as 'two tangents lengths values,' learners will apply circular geometry rules. Each problem presents a diagram with labeled circle-related features and provides multiple-choice answer options, enhancing students' ability to visualize and solve geometry challenges involving circles. This is part of a broader review of circular geometry rules.