Reflections across Vertical Lines
Video: Reflection over a horizontal or vertical line
Properties of Reflections
Which statements about reflections are true? Select all that apply.
Horizontal or Vertical Lines
Is the graph of y = 4 horizontal or vertical?
Use the graph below to answer the questions that follow.
Question 1
Reflect the point A(2, 3) over the line y = 2. 1) Graph the vertical line y = 2 using the line tool. 2) Plot the point (2, 3) 3) Use the "reflect about line" tool to reflect the point What is the location of the point A' ?
Question 2
Reflect the point A(2, 3) over the line y = -4. 1) Graph the vertical line y = -4 using the line tool. 2) Plot the point (2, 3) 3) Use the "reflect about line" tool to reflect the point What is the location of the point A' ?
Question 3
Reflect Triangle ABC over the line y = -1. Triangle ABC is located at A(-2, 2) B(1, 1) C(3, 5) 1) Graph the vertical line y = -1 using the line tool. 2) Plot the triangle using the polygon tool 3) Use the "reflect about line" tool to reflect the triangle What are the coordinates of A'B'C'?
Question 4
Based on the previous problems, what observations do you have about reflecting points across any horizontal line (y = #) ? Are there any similarities to reflecting over the x-axis (the x-axis is a horizontal line)?