A figure surrounded by straight lines Student activity Play

A figure surrounded by straight lines Whiteboard exercise Play

A horseshoe magnet Animation Play

A line parallel to a given line Whiteboard exercise Play

A line parallel to a given line Student activity Play

A parallel combination Animation Play

A perpendicular through a point off the line Student activity Play

Aberration Animation Play

Adapter Animation Play

Adding bulbs to a series circuit Simulation Play

Addition and subtraction of parallel vectors Student activity Play

Addition of parallel vectors Whiteboard exercise Play

Alternate exterior angles Animation Play

Alternate interior angles Animation 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

Angle sum of a triangle – observation and proof Student activity Play

Angles and parallel lines Whiteboard exercise Play

Angles between lines in 3-D objects Whiteboard exercise Play

Angles between lines in 3-D objects Student activity Play

Arbitrary shapes bounded by straight lines Student activity Play

Arbitrary shapes bounded by straight lines Whiteboard exercise Play

Are there any solutions? Student activity Play

Arms of the angle and parallel lines Student activity Play

Arms of the angle and parallel lines Whiteboard exercise Play