TMUA Practice Question — Worked Solution

P2·Coordinate Geometry·5.5Mock 0 · P2 · Q9

lattice pointsangle in a semicirclecircleperpendicular linescounting

The points

A

and

B

have coordinates

(7, 0)

and

(0, 1)

.How many points

P

, both of whose coordinates are integers, are there such that triangle

A P B

has a right angle at

P

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