Lesson: Dilation: Positive Scale Factors Mathematics • 8th Grade
In this lesson, we will learn how to dilate shapes about a center of dilation by positive scale factors and fractional and whole numbers and how to describe dilations.
Dilate triangle from the origin by a scale factor of 2, and state the coordinates of the image.
Triangle has been dilated from point to triangle and, hence, the two triangles must be similar. What do you notice about the measures of the angles in both shapes?
The figure shows two triangles: and .
Describe the single transformation that would map onto .
Hence, determine whether triangles and are similar.