dietrich_harmon
The area of sector AOB is 20.25 ft2. Find the exact area of the shaded region.
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dietrich_harmon
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A. (20.25- 40.5 ft2
B. (20.25 - 81) ft2
C. ( 20.25 - 40.5 2 ) ft2
D. none of these
Directrix
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|dw:1360004880244:dw|
Directrix
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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
dietrich_harmon
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?B
Directrix
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81 is not the area of the triangle. Try again.
dietrich_harmon
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it gonna be A or c
dietrich_harmon
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@Directrix
Directrix
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What is the area of the triangle? A = (1/2) b*h so ..
Directrix
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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
dietrich_harmon
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i go with c then thanks
Directrix
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Alrighty, then.
dietrich_harmon
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@Hero
Directrix
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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.
dietrich_harmon
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D then @Directrix
Directrix
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Yes, this was a good "tricky" question. We should have picked up on that negative business but better late than never. :)
dietrich_harmon
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thank u