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100 POINTS !!! What is the approximate sector area of a sector defined by minor arc BA (i.e. the shaded region)?

100 POINTS !!! What is the approximate sector area of a sector defined by minor arc-example-1
User Ldeassis
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1 Answer

4 votes

Answer:

d. 68.1 in²

Explanation:

m∠AHB = 61°

Angle AHB is an inscribed angle, then the next relationship must be satisfied:

m arc AB/2 = m∠AHB

m arc AB = 61°*2 = 122°

GB = 8 in represents the radius of the circle

The sector area is a proportion of the area of the complete circle (360°)

area of the circle = π*radius²

area of the circle = π*8²

area of the circle = 201.06 in²

The following proportion must be satisfied:

360° / 201.06 in² = 122° / x in²

x = 201.06*122/360

x = 68.1 in²

User Hwau
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