1. Visiting the Dubai Mall Image: http://www.destination360.com/middle-east/united-arab-emirates/dubai-mall

2. Visiting the Dubai Mall The world’s largest shopping destination. 1,200 retail outlets, two anchor department stores, and over 160 food and beverage outlets The Dubai Mall is your ultimate destination for great shopping and entertainment in the city. Click here for a virtual tour.

3. Image: http://www.destination360.com/middle-east/united-arab-emirates/dubai-mall

4. In this lesson you will learn how to find the measurement of an exterior angle by using your knowledge of supplementary angles.

5. Let’s Review Supplementary angles 1 2 120° 60°

6. Let’s Review Adjacent angles 1 2

7. A Common Mistake x°x° y°y° B A C D

8. Let’s Review Core Lesson AC B Exterior Interior

9. Let’s Review Core Lesson Find the value of x. 57°x°x° B A C D

10. Let’s Review Core Lesson 52 + 27 + x = 180 73 + x = 180 x = 107 x + y = 180 y = 73 x°x° y°y° 27° 52° C A BD

11. Let’s Review Core Lesson 52 + 27 + x = 180 and x + y = 180 x° y°y° 27° 52° C A BD

12. Let’s Review Core Lesson (2x – 15) + (x – 5) = 148 3x – 20 = 148 3x = 168 x = 56 148° (2x – 15)° (x – 5)°

13. In this lesson you have learned how to find the measure of an exterior angle by using your knowledge of supplementary angles. Summary:

14. Let’s Review Quick Quiz Find the value of x 112° 32° x°x° Question #1

15. Let’s Review Quick Quiz Find the value of x and the measurement of each interior angle. (100)° (2x + 27)° (2x – 11)° BA C Question #2

16. Let’s Review Quick Quiz Find the value of x and each interior angle. (x + 16)° (5x)° (3x – 7)° BA C Question #3