The true statement for the Pentagon in the given graph is
The scale factor of the dilation is 1/2 with the center at the origin(0,0).
Dilation:
Dilation implies resize of any object.
- It may increase or decrease the object by a particular value.
- The particular value is called the scale factor.
Properties of Dilation of figure:
- Parallel lines in the dilated figure remain the same as in the original figure.
- The dilation of any figure does not vary from each angle of the figure.
- The midpoints of the dilated figure remain the same as that of the original figure.
True statement:
The scale factor of the dilation of the pentagon is 1/2.
Reason:
- The pentagon with vertices A(0.5,4.5), B(2,3), C(1,0), D(-2,0), E(-3,3) when multiplied by 1/2 we get
- The vertices of the dilated pentagon as A'(0.25,2.25), B'(1,1.5), C'(0.5,0), D'(-1,0), E(-1.5,1.5).
- When we plot the points A'B'C'D'E' in the graph, obtain the dilated pentagon with a center at the origin.
Wrong statement with Reasons:
- The scale factor of the dilation is not 1/4 because when we multiply the vertices of pentagon ABCDE by 1/4 we are not getting the dilated points as in the graph.
- The line EA is parallel to E'A' but,
1. The line EA does not passes through the center of the dilation
at origin(0,0), which can be clearly seen from the given graph.
2. For two lines to be parallel it is not necessary for one of the
lines to pass through the origin.
- The line C'D' is parallel to CD as we should see the figure in a 3-dimensional way and it also follows the properties of dilation of a figure.
Hence the scale factor of the given pentagon is 1/2.
To learn more about the Dilation of polygons:
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