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Julli [10]
3 years ago
13

A sector of a circle of radius "r" cm has an area of "A"cm². Express the perimeter of the sector in terms of "r" and "A"

Mathematics
1 answer:
Andrews [41]3 years ago
6 0

Answer:

2A/r + 2r

Step-by-step explanation:

A sector is made of an arc and two radii. As such, the perimeter of the sector is the sum of the length of an arc and the two radii. Given that the radius is r and the area is A, the area of a sector A

= Ф°/360° * πr²

The length L of an arc of the sector

= Ф°/360° * 2πr

Hence,

A/L = r/2

L = 2A/r

The perimeter of the sector

= L + 2r

= 2A/r + 2r

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Lynne bought a bag of grapefruit, 1 5_ 8 pounds of apples, and 2 __3 16 pounds of bananas. The total weight of her purchases was
solmaris [256]

Answer:

3 11/16 pounds

Step-by-step explanation:

Lynne bought a bag of grapefruit, 1 5/8 pounds of apples, and 2 3/16 pounds of bananas. The total weight of her purchases was 7 1/2 pounds. How much did the bag of grapefruit weigh?'

The Total weight = Weight of grape fruits + Weight of Apples + Weight of Bananas

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x = 7 1/2 - (1 5/8 + 2 3/16)

Lowest Common Denominator = 16

x= 7 1/2 - 3 + ( 10+ 3/16)

x = 7 1/2 - 3 + (13/16)

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3 0
3 years ago
Need help please help please please please please
REY [17]
<h3>1+3/4*1*3/5</h3><h3>7/4*8/5</h3><h3 /><h3>56/20</h3><h3>2+16/20</h3>
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