Let PQR be the right angled isosceles triangle, right angled at P(2,1). If the
equation of the line QR is , then the equation representing the pair
of lines
PQ and PR is
b
If is the slope of slide PQ and PR, then
, slope of QR is -2 and
Equations of side PQ and PR are
Their combined equation is
Which is given in (b).
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