## dietrich_harmon 2 years ago The area of sector AOB is 20.25 ft2. Find the exact area of the shaded region.

1. dietrich_harmon

2. dietrich_harmon

A. (20.25- 40.5 ft2 B. (20.25 - 81) ft2 C. ( 20.25 - 40.5 2 ) ft2 D. none of these

3. Directrix

|dw:1360004880244:dw|

4. Directrix

Subtract the area of the right triangle from the given area of the sector and you will get the shaded area (known as segment of a circle). What is the area of the right triangle? @dietrich_harmon

5. dietrich_harmon

?B

6. Directrix

81 is not the area of the triangle. Try again.

7. dietrich_harmon

it gonna be A or c

8. dietrich_harmon

A

9. dietrich_harmon

@Directrix

10. Directrix

What is the area of the triangle? A = (1/2) b*h so ..

11. dietrich_harmon

C

12. Directrix

c) looks sketchy with C. ( 20.25 - 40.5 2 ) ft2 If the area is 40.5, what is that extra 2 doing there? @dietrich_harmon

13. dietrich_harmon

i go with c then thanks

14. Directrix

Alrighty, then.

15. dietrich_harmon

@Hero

16. Directrix

All of these options --> . (20.25- 40.5 ft2 B. (20.25 - 81) ft2 C. ( 20.25 - 40.5 2 ) ft2 give negative areas. Area is not negative so that leaves one option.

17. dietrich_harmon

D then @Directrix

18. Directrix

Yes, this was a good "tricky" question. We should have picked up on that negative business but better late than never. :)

19. dietrich_harmon

thank u