Post on 14-Feb-2016
description
Warm-Up
Practice #69 on the iPad
Vocabulary
• Scale factor- how much a shape is enlarged (bigger) or reduced (smaller).– Scale factor > 1 = bigger– Scale factor < 1 = smaller
• Dilation- transformation that changes the size but not the shape of a figure.
Example
Determine the scale factor used to dilate ΔABC into ΔDEF
Fraction: Ratio: Decimal: Percent:
A
B C
D
E F15
18 21 8
Example
Determine the coordinatesof ΔA’B’C’ if ΔABC is dilated by a factor of: a)
b) 4