http://www.ck12.org Chapter 7. Similarity
Watch this video for help with the Examples above.
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/52563CK-12 Foundation: Chapter7DilationB
Vocabulary
Adilationan enlargement or reduction of a figure that preserves shape but not size. All dilations are similar to the
original figure.Similarfigures are the same shape but not necessarily the same size. Thecenter of a dilationis the
point of reference for the dilation and thescale factorfor a dilation tells us how much the figure stretches or shrinks.
Guided Practice
- Find the perimeters ofKLMNandK′L′M′N′. Compare this ratio to the scale factor.