Math Problem Statement

Determine the value of y in the second quadrilateral, given that two quadrilaterals ABCD and EFGH are similar, and the side lengths of ABCD are AB = 16, BC = 15, CD = 18.7 and for EFGH are EF = 8, FG = y, GH = 9.4.

Solution

The image shows two quadrilaterals, labeled ABCDABCD and EFGHEFGH, and it specifies that they are similar, denoted by ABCDEFGHABCD \sim EFGH. Some side lengths are given for both quadrilaterals, and you are asked to solve for yy, which seems to be a missing side of the second quadrilateral EFGHEFGH.

Steps to solve for yy:

Since the quadrilaterals are similar, corresponding sides of the two figures are proportional. This means we can set up a proportion using the known side lengths to solve for yy.

From the image:

  • AB=16AB = 16, BC=15BC = 15, and CD=18.7CD = 18.7 for quadrilateral ABCDABCD.
  • EF=8EF = 8, FG=yFG = y, and GH=9.4GH = 9.4 for quadrilateral EFGHEFGH.

Using the similarity of the two quadrilaterals, we can write the proportion: ABEF=BCFG=CDGH\frac{AB}{EF} = \frac{BC}{FG} = \frac{CD}{GH} Substitute the known values: 168=15y=18.79.4\frac{16}{8} = \frac{15}{y} = \frac{18.7}{9.4} Now, solving for yy, we can use the fact that 168=2\frac{16}{8} = 2, which gives us: 2=15y2 = \frac{15}{y} Multiplying both sides by yy: 2y=152y = 15 Solving for yy: y=152=7.5y = \frac{15}{2} = 7.5

Thus, y=7.5y = 7.5.

Would you like more details on this solution or have any other questions?

Related Questions:

  1. What are the properties of similar figures?
  2. How do you determine the scale factor between two similar polygons?
  3. Can similarity be used to find angles in quadrilaterals?
  4. How does the proportionality of corresponding sides extend to corresponding diagonals?
  5. What is the difference between congruent and similar figures?

Tip: Always check for corresponding sides or angles when solving problems involving similar polygons!

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Math Problem Analysis

Mathematical Concepts

Geometry
Proportionality
Similar Figures

Formulas

Proportion Formula: (a/b = c/d)

Theorems

Theory of Similar Figures

Suitable Grade Level

Grade 7-10