Area of Region Defined by Inequalities
CAT 2019 Slot 1 · QA · Medium · Co-geometry
Let be the set of all points in the x-y plane such that and . Then, the area, in square units, of the region represented by equals
Answer
2
Explanation
forms a square with vertices at , total area . restricts or . The region is composed of two symmetrical triangles on the left and right. In the first quadrant (): . For , goes from to . This is a right triangle with base and height , area . By 4-fold symmetry across quadrants, total area .
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