2. Becky Afghani, LBUSD Math Office, 2002 1 Slide Show by Becky Afghani

3. Becky Afghani, LBUSD Math Office, 2002 Objective2 In this slide show, you will learn how to find the measure of the angle for any given time on the clock. Angles are formed by the hands on a clock.

4. Becky Afghani, LBUSD Math Office, 2002 3 A clock is just a circle.

5. Becky Afghani, LBUSD Math Office, 2002 4 Central angles in a circle are measured in degrees. 90° 4 = 360°

6. Becky Afghani, LBUSD Math Office, 2002 5 How many degrees are between consecutive numbers on a clock? ? 90°  3 = 30°

7. Becky Afghani, LBUSD Math Office, 2002 6 Find the measure of the angle formed by the hands of the clock. 30°

8. Becky Afghani, LBUSD Math Office, 2002 7 Find the measure of the angle formed by the hands of the clock. 30° 4 = 120 ° 30°

9. Becky Afghani, LBUSD Math Office, 2002 8 Find the measure of the angle formed by the hands of the clock. 30° 5 = 150 °

10. Becky Afghani, LBUSD Math Office, 2002 9 90° + 15° = 105° How about a harder one? 30° 3 = 90° 30°  2 = 15° 30°

11. Becky Afghani, LBUSD Math Office, 2002 10 This last one’s even harder! 30° + ? 30° What fraction of the way between 4 and 5 should the little hand be? 15 2 30° + 7 °= 37 °