You might like Left Right Lecture Diagram: An Equilateral Triangle Flat on the Ground, with Sides Parallel to the Picture Joseph Mallord William Turner c.1816–28 Lecture Diagram: Anamorphic Perspective Joseph Mallord William Turner c.1817–28 Lecture Diagram: Square and Circle Joseph Mallord William Turner c.1817–28 Lecture Diagram: Three Squares, Intersected Joseph Mallord William Turner c.1817–28 Lecture Diagram: Two Equilateral Triangles Joseph Mallord William Turner c.1817–28 Lecture Diagram: Three Equilateral Triangles Joseph Mallord William Turner c.1817–28 Lecture Diagram: Two Octagons Joseph Mallord William Turner c.1817–28 Lecture Diagram: A Triangle Joseph Mallord William Turner c.1817–28 Lecture Diagram: Perspective Representation of a Triangle Joseph Mallord William Turner c.1810–28 Lecture Diagram: Various Figures Joseph Mallord William Turner c.1817–28 Lecture Diagram: Figure, with Outstretched Arms and Legs, Enclosed within a Circle: Front View Joseph Mallord William Turner c.1812–28 Lecture Diagram: Figure, with Outstretched Arms and Legs, Enclosed within a Square: Back View Joseph Mallord William Turner c.1812–28