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manarsadi6
19.07.2019 •
Mathematics
To the nearest tenth, what is the area of the shaded segment when ag = 6 ft? 10.3 ft2 21.1 ft2 1.7 ft2 28.3 ft2
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Ответ:
Option A is correct.
Step-by-step explanation:
Given:
AG = 6 ft ⇒ Radius of the circle , r = 6 ft
⇒ GB = AG = 6 ft
To find: Area of shaded Segment.
Area of Shaded Segment = Area of Sector AGBA - Area of Δ AGB
Sector AGBA forming 90° angle at center.![\implies\,\theta=90^{\circ}](/tpl/images/0107/1434/75dc0.png)
Area of Sector =![\frac{\theta}{360}\times\pi r^2](/tpl/images/0107/1434/fed48.png)
Area of Sector AGBA =![\frac{90}{360}\times3.14\times6^2](/tpl/images/0107/1434/952ec.png)
=![\frac{1}{4}\times3.14\times36](/tpl/images/0107/1434/5c441.png)
=![28.26\:ft^2](/tpl/images/0107/1434/4bdd9.png)
ΔAGB is a right angled triangle.
So, Area of ΔAGB =![\frac{1}{2}\times AG\times GB](/tpl/images/0107/1434/60155.png)
=![\frac{1}{2}\times6\times6](/tpl/images/0107/1434/f08c8.png)
=![6\times3](/tpl/images/0107/1434/c7d08.png)
=![18\:ft^2](/tpl/images/0107/1434/b6fdc.png)
Area of Shaded Segment = 28.26 - 18 = 10.26 ≈ 10.3 ft²
Therefore, Option A is correct.
Ответ:
second 1
Step-by-step explanation: