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☼ LINE ☼

☼ Parametric Equation of a line :–

↦ $\overleftrightarrow{AB}$ = { (x, y) / x = tx₂+ (1 – t)x₁, y = ty₂+ (1 – t)y₁ ; t ∈ R }

$\overline{\mathrm{AB}}$ = { (x, y) / x = tx₂+ (1 – t)x₁, y = ty₂+ (1 – t)y₁ ; t ∈ [0, 1] }

$\overrightarrow{AB}$ = { (x, y) / x = tx₂+ (1 – t)x₁, y = ty₂+ (1 – t)y₁ ; t ≥ 0 }

$\overrightarrow{BA}$ = { (x, y) / x = tx₂+ (1 – t)x₁, y = ty₂+ (1 – t)y₁ ; t ≤ 1 }

$\overrightarrow{AB}$ – $\overline{\mathrm{AB}}$ = { (x, y) / x = tx₂+ (1 – t)x₁, y = ty₂+ (1 – t)y₁ ; t ≥ 1 }

$\overleftarrow{AB}$ – $\overline{\mathrm{AB}}$ = { (x, y) / x = tx₂+ (1 – t)x₁, y = ty₂+ (1 – t)y₁ ; t ≤ 0 }