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Big Ideas Math Geometry, 2014

BI

Big Ideas Math Geometry, 2014 View details

3. Rotations

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Exercise 41 Page 196

Think about the transformation that may have been done to make the first figure look like the second figure.

Corresponding Sides	Corresponding Angles
AB & JK	∠ A & ∠ J
BC & KL	∠ B & ∠ K
CD & LM	∠ C & ∠ L
DA & MJ	∠ D & ∠ M

Practice makes perfect

If we connect the angles that seam to be similar, it appears that ABCD is a translation of JKLM.

Since ABCD and JKLM are in the same relative position, we can more easily match the corresponding sides and angles.

Using the first image, we can see which angles correspond and the second to relate the sides.

Corresponding Sides	Corresponding Angles
AB & JK	∠ A & ∠ J
BC & KL	∠ B & ∠ K
CD & LM	∠ C & ∠ L
DA & MJ	∠ D & ∠ M

Subchapter links

Communicate Your Answer p.189

Monitoring Progress p.191-193