170s Classroom → 45s Sub-90 Target27-Q Mathematics 2 Mock
Archetype Sub-90 Dry-Wipe Invariant (Circle Coordinate Geometry, Tangent Discriminants & Extremal Distances): Never substitute y = mx + c into a circle if you can use geometry: a line is tangent iff perpendicular distance from centre (a,b) equals radius r, and shortest distance to an external point P is |CP| - r.
sub90 ESATARCH-MM-05: Circle Coordinate Geometry, Tangent Discriminants & Extremal DistancesMathematics 2
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SUB-90 ZONE (<45S)
0.0s45s Sub-9090s ESAT Budget150s Classroom
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Mathematics 2•ARCH-MM-05•Standard 5-Option
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