1. What if we enlarged the rectangle by a scale of 2:1, what is the area then?
Rectangle C
2 cm
5 cm
Example 2

2. What if we enlarged the rectangle by a scale of 2:1, what is the perimeter then?
Rectangle C
2 cm
5 cm
Example 2 Continued

3. Congruent Triangles

4. The Side-Angle-Side (SAS) Congruence Theorem
If 2 sides and the included angle of a are congruent to the corresponding 2 sides and the included angle of a second
, then the ‘s are congruent.

5. 8.3 (8th) Number 8

6. 8.3 (8th) Number 14

7. Included side= the line segment between 2 angles of a
The Angle-Side-Angle (ASA) Congruence Thm
If 2 angles and the included side of a are congruent to the corr. 2 angles and the included side of another , then the ‘s are congruent.

8. 8.4 (8th) Number 2

9. The Angle-Angle-Side (AAS) Congruence Thm if 2 angles and the non-included side of a are congruent to the corr. Angles and non- included side of another , then the ‘s are congruent.

10. 8.4 (8th) Number 5

11. 8.4 (8th) Number 15

12. 9.1 (8th) Number 3

13. Example