Using the definition of a trapezoid, the segment within a large playlist on basic geometry explains other properties of trapezoids. The video introduces the special properties held by isosceles trapezoids.

Concepts

isosceles trapezoids, trapezoids, congruent angles, bases, parallel lines

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Additional Tags

math

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Instructional Ideas

• Lead a discussion on how the properties of parallel lines and a transversal can be used to show properties of trapezoids

Classroom Considerations

• Uses the exclusive definition of trapezoids
• Pupils should be comfortable with solving linear equations involving averages

• This video is hosted on YouTube

Pros

• Works several problems involving properties of trapezoids and isosceles trapezoids
• Links to other trapezoid resources

Cons

• The audio is slightly distorted