Big Ideas Math Integrated I, 2016
BI
Big Ideas Math Integrated I, 2016 View details
2. Congruent Polygons
Continue to next subchapter

Exercise 11 Page 599

Show that corresponding parts are congruent.

See solution.

Practice makes perfect

We can show that two figures are congruent by showing that all their corresponding parts are congruent.

Corresponding angles

Let's analyze the given figures.

We can see that ∠ Z, ∠ Y, ∠ J, and ∠ N are all right angles. Since all right angles are congruent, we can say that ∠ Z≅ ∠ J and ∠ Y≅∠ N. Moreover, note that we are given markers on other angles. They indicate that the corresponding angles are congruent.

This means that ∠ V ≅ ∠ K, ∠ X ≅ ∠ M, and ∠ W ≅ ∠ L. Therefore, all corresponding angles are congruent.

Corresponding Sides

To determine the congruency of the corresponding sides, let's first find the corresponding pairs on the graph.

Now, we can compare them. Similarly as with the angles, we are given markers on every side.

Side Corresponding side Congruent
YZ NJ Yes
XY MN Yes
WX LM Yes
WV LK Yes
VZ KJ Yes

We found that all the pairs of corresponding sides are also congruent. Since all the corresponding parts are congruent, the figures are congruent. To write an example congruent statement, we need to present corresponding vertices in the same order. V corresponds to K W corresponds to L X corresponds to M Y corresponds to N Z corresponds to J Therefore, we can say that V W XYZ ≅ K LMNJ.