Understanding Dilations: Enlarging and Reducing Parallelograms

The video tutorial explains the concept of dilation in geometry, focusing on how enlarging or reducing a figure affects its properties. It reviews key vocabulary such as congruent angles, parallel lines, and scale factor. The tutorial demonstrates enlarging a parallelogram, highlighting the creation of a new image with proportional sides and congruent angles, leading to similar figures. It also covers the preservation of parallelism during dilation and explores the effects of reducing a figure. The lesson concludes with a recap of the changes and constants in dilation, emphasizing the concepts of similarity and transformation.

Explain how the scale factor affects the size of a figure.

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What is the mathematical term for reducing or enlarging figures?

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Describe the relationship between corresponding sides of similar figures.

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What does it mean for two shapes to be similar?

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What remains unchanged after a dilation of a figure?

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