Trapezoid ABCD was dilated to create trapezoid A’B’C’D’. On a …

Mathematics Questions

Trapezoid ABCD was dilated to create trapezoid A’B’C’D’. On a coordinate plane, 2 trapezoids are shown. Trapezoid A B C D has points (negative 4, 0), (negative 2, 4), (2, 4) and (4, 0). Trapezoid A prime B prime C prime D prime has points (negative 2, 0), (negative 1, 2), (1, 2), and (2, 0). Which statements are true about the trapezoids? Select three options. The length of side AD is 8 units. The length of side A’D’ is 4 units. The image is larger than the pre-image. Sides CD and C’D’ both have the same slope, 2. The scale factor is 1/2.

Short Answer

The lengths of sides AD and A’D’ were calculated as 8 units and 4 units, respectively, demonstrating that the image is not larger than the pre-image. Additionally, the scale factor between the trapezoids was determined to be 1/2, confirming the statement about the trapezoid sizes as true.

Step-by-Step Solution

Step 1: Calculate Lengths of Sides

To verify the statements about the trapezoids, we first need to determine the lengths of the sides using the distance formula, which is given by:

  • For side AD: AD = sqrt((4 – (-4))^2 + (0 – 0)^2) = sqrt(8^2) = 8 units.
  • For side A’D’: A’D’ = sqrt((2 – (-2))^2 + (0 – 0)^2) = sqrt(4^2) = 4 units.

The calculations confirm that the lengths of side AD and side A’D’ are 8 units and 4 units, respectively.

Step 2: Evaluate Image Size Comparison

Next, we compare the lengths of corresponding sides of the trapezoids to analyze if the image is larger than the pre-image. We observe the following:

  • Length of side AD is 8 units.
  • Length of side A’D’ is 4 units.

Since the side lengths are not proportional (AD > A’D’), it indicates that the image is not larger than the pre-image, making this statement false.

Step 3: Determine the Scale Factor

The scale factor can be calculated by comparing the lengths of corresponding sides of the trapezoids. The formula for the scale factor is:

  • Scale Factor: = Length of A’D’ / Length of AD = 4 / 8 = 1/2.

Thus, the scale factor of 1/2 is accurate, confirming this statement as true.

Related Concepts

Distance Formula

A mathematical formula used to calculate the distance between two points in a coordinate system, defined as the square root of the sum of the squares of the differences of their coordinates.

Scale Factor

A ratio that describes how much a figure has been enlarged or reduced, calculated by comparing the lengths of corresponding sides of similar figures.

Trapezoid

A four-sided figure (quadrilateral) with at least one pair of parallel sides, often analyzed in geometry for properties such as angles and side lengths.

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