Transformations: Rotations and Dilations

Warm-Up Icon Section Warm-Up

In this section, we are going to continue studying transformations.  Before we look at two more transformations, let’s review what was taught in the first lesson.

think icon Think & Click: Section Warm-Up

Complete the Think & Click activity by looking at each problem below, thinking about it, and then clicking on the question to reveal the solution.

Triangle ABC has vertices at A (-4, 1), B (0, 5) and C (3, -5).

1. What are the coordinates of triangle A’B’C’, which is a translation of triangle ABC 2 units to the left and 3 units up?

A’ (-6, 4), B’ (-2, 8) and C’ (1, -2)

2.   What are the coordinates of triangle A’B’C’, which is a reflection of triangle ABC through the x-axis?

A’ (-4, -1), B’ (0, -5) and C (3, 5)

3.  What are the coordinates of triangle A’B’C’, which is a reflection of triangle ABC through the line y = x?

A’  (1, -4), B’ (5, 0) and C’ (-5, 3)