Download presentation

Presentation is loading. Please wait.

Published byEthan Callahan Modified over 4 years ago

1
Areas of Circles & Sectors

2
Thm 11.7 – Area of a Circle – A = r2 * Remember to square the radius 1st, then multiply by !

3
Ex: Find the area of circle C. A = r2 A = (3)2 A = 9 cm2 OR 28.27 cm2 C 3 cm

4
Ex: Find the diameter of circle C if the area is 16 ft2. A = r2 16 = r2 16 = r2 ð16 = r 4 ft = r So, d = 8 ft.

5
Sector of a Circle The region bounded by 2 radii & their intercepted arc. Sector Also a sector Visually, it might remind you of a slice of pizza or a piece of pie.

6
Thm 10-12 – Area of a Sector –

7
Ex: Find the area of the small sector shown. 135o 1 1 m

8
Ex: L & M are 2 pts. on a circle R with r=50 cm & mLRM=150o. Find the areas of the sectors formed by LRM. 150o I II L M R 5 0 c m

9
Ex: Find the area of the shaded region. 4 c m r 2 4 c m 30o 2 2ð3 4ð3 (4) 2 16 16 - 12ð3 = 29.5 cm2

Similar presentations

Presentation is loading. Please wait....

OK

1. A circle graph has a section marked “Potatoes: 28%.”

1. A circle graph has a section marked “Potatoes: 28%.”

© 2019 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google