Download presentation

Presentation is loading. Please wait.

Published byEthan Callahan Modified over 2 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 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 – 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) ð3 = 29.5 cm2

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google