McGraw Hill Integrated II, 2012
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McGraw Hill Integrated II, 2012 View details
Study Guide and Review
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Exercise 15 Page 607

Begin by identifying the pairs of congruent angles, then compare the ratios of corresponding sides.

Are the Figuers Similar? No.
Example Explanation: ABEF ≠ BCFG

Practice makes perfect

To determine whether two polygons are similar, we need to follow two steps.

  1. Identify pairs of congruent angles.
  2. Compare the ratios of corresponding sides.
Let's analyze the given polygons.

Identifying Congruent Angles

Looking at the angle markers on the polygons, we can tell that there are four pairs of congruent angles. ∠ A ≅ ∠ E ∠ B ≅ ∠ F ∠ C ≅ ∠ G ∠ D ≅ ∠ H

Comparing the Ratios

Now, let's compare the ratios of the corresponding sides. Recall that the included side between a pair of angles of one polygon corresponds to the included side between the corresponding pair of congruent angles of another polygon.

Corresponding Sides Ratio Substitute Lengths Simplify
A B, E F AB/EF 4/10 2/5
B C, F G BC/FG 6/16 3/8
C D, G H CD/GH 4/10 2/5
D A, H E DA/HE 6/16 3/8

As we can see, the ratios are not equal. Therefore, the given polygons are not similar.