A figure surrounded by straight lines Student activity Play

A figure surrounded by straight lines Whiteboard exercise Play

A horseshoe magnet Animation Play

Algebraic solutions Student activity Play

An application of vector equations of lines in 3-D Whiteboard exercise Play

An application of vector equations of lines in 3-D Student activity Play

Angles and parallel lines Whiteboard exercise Play

Angles between lines in 3-D objects Student activity Play

Angles between lines in 3-D objects Whiteboard exercise Play

Arbitrary shapes bounded by straight lines Student activity Play

Arbitrary shapes bounded by straight lines Whiteboard exercise Play

Arms of the angle and parallel lines Student activity Play

Arms of the angle and parallel lines Whiteboard exercise Play

Circle inscribed into a quadrilateral Student activity Play

Coinciding lines Animation Play

Common points of two lines in space Whiteboard exercise Play

Common points of two lines in space Student activity Play

Conic sections Student activity Play

Construction of a circle inscribed into a quadrilateral Animation Play

Converting Imperial units of length Whiteboard exercise Play

Crossing lines cut by two parallel lines Animation Play

Direct current transmission lines Whiteboard exercise Play

Direct current transmission lines Student activity Play

Direct current transmission lines Animation Play

Double cone and a plane Animation Play