Coordinate Geometry Calculator

Distance • Midpoint • Slope • Line equations • Triangle area • Section formula • Point–line distance

Tip: press Enter to compute

Points

Point A (x₁,y₁)

Point B (x₂,y₂)

Point C (x₃,y₃) — for triangle

Section ratio m:n (optional)

Point–Line Distance

Line coefficients (Ax + By + C = 0)

Point P (x₀,y₀)

Quick Plot

Plots A, B, C and line AB if both points are set. Scale auto-fits your points.

Math notes: distance √((x₂−x₁)²+(y₂−y₁)²); midpoint ((x₁+x₂)/2,(y₁+y₂)/2); slope m=(y₂−y₁)/(x₂−x₁) if x₂≠x₁; line through A,B: Ax+By+C=0 with A=y₁−y₂, B=x₂−x₁, C=x₁y₂−x₂y₁; triangle area via shoelace; section point (internal) P=((mx₂+nx₁)/(m+n),(my₂+ny₁)/(m+n)).