The Complete Quadrilateral

Author:Steve Phelps

The complete quadrilateral consists of four coplanar straight lines – l₁, l₂, l₃and l₄– intersecting in three pairs of opposite vertices – A₁₄, A₂₃ , A₁₃, A₂₄ , A₁₂and A₃₄.

New Resources

Function art 3D - waiting shed (v2)
繪畫垂直線
Angle Addition Postulate (V2) - Integer Solutions
Right Triangle Inscribed in a Semicircle
Congruent Sides & Angles in △s: Exploration

Discover Resources

vernier scale for calipers
Converse of Perpendicular Bisector Theorem
Klett LS KS BW 244-5
Untitled
Rectangular Prism: Basic Net Demo

Discover Topics

Root
Differential Calculus
Cone
Functions
Ratios