This math topic focuses on the geometry of circles, specifically the calculation of sector areas given the total area of the circle. Students are presented with various circle diagrams and are required to determine the area of a shaded sector based on the provided total area. Multiple-choice answers are given for each question, allowing students to apply their knowledge of formulas involving circle geometry to solve the problems. This is suitable for intermediate level practice in geometry.
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If the total area of the circle is 2, what is the area of the shaded sector?