Скачать или смотреть Three points P(h, k), Q(𝒙_𝟏,𝒚_𝟏) & R(𝒙_𝟐, 𝒚_𝟐) lie on a line. Show that (𝒉−𝒙_𝟏).(𝒚_𝟐−𝒚_𝟏).......

Class XI Straight Lines
Three points P(h, k), Q(x_1,y_1) & R(x_2, y_2) lie on a line. Show that (h-x_1).(y_2-y_1)=(k-y_1 ).(x_2-x_1 )

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