Dilation of Triangles and Coordinates

Miss Harkness explains how to dilate figures on a coordinate plane using an example problem. The video covers setting up the problem, understanding dilation, calculating new coordinates, and finalizing the solution. Key points include identifying original coordinates, applying the scale factor, and ensuring no unnecessary constructions are made. The lesson concludes with tips on reading directions and understanding problem requirements.

What is the main topic discussed in this video?

• Dilating figures on the coordinate plane

• Solving quadratic equations

• Finding the area of triangles

• Graphing linear equations

In the example problem, from where is triangle ABC dilated?

• Point C

• Point A

• Point B

• The origin

What are the original coordinates of point A in triangle ABC?

• (-4, 4)

• (-11, 2)

• (0, 0)

• (-10, 6)

What is the scale factor used to dilate triangle ABC?

• 5

• 3

• 2

• 4

What is the new coordinate of point A' after dilation?

• (0, 0)

• (-40, 24)

• (-44, 8)

• (-16, 16)

Why is it unnecessary to graph the dilated triangle in this problem?

• Graphing is too complex

• The triangle is already graphed

• The graph is too small

• The problem only asks for coordinates

What is the new coordinate of point B' after dilation?

• (-40, 24)

• (-44, 8)

• (-16, 16)

• (-40, 8)

What is the new coordinate of point C' after dilation?

• (-44, 8)

• (-40, 24)

• (-16, 16)

• (0, 0)

What should you do after finding the original coordinates of a figure?

• Change the scale factor

• Erase the original figure

• Draw the figure

• Multiply by the scale factor

What is the final step in solving the dilation problem?

• Graph the new triangle

• Check the original coordinates

• Verify the scale factor

• Ensure all directions are followed