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FrozenT [24]
3 years ago
14

In the figure, angle ZYX is measured in degrees. The area

Mathematics
2 answers:
skad [1K]3 years ago
7 0

Answer:

the answer is A on e2020

Step-by-step explanation:

VARVARA [1.3K]3 years ago
3 0

Answer:

The central angle measure of the sector divided  by the total angle measure of a circle multiplied by the area of the circle will yield the area of the sector

Step-by-step explanation:

we know that

The formula to calculate the area of sector is equal to

A_s=\frac{x}{y}A_c

where

A_s ----> is the area of sector    

x ----> is the central angle measure of the sector in degrees

y  ---> total angle measure of a circle in degrees

A_c ---> represent the area of the circle

see the attached figure to better understand the problem

we have

x=m\angle ZYX=\theta^o ----> central angle of sector ZYX

y=360^o ----> total angle measure of a circle in degrees

A_c=\pi r^{2} ---> represent the area of the circle

substitute in the formula

A_s=\frac{\theta^o}{360^o} (\pi r^{2})

therefore

The central angle measure of the sector divided  by the total angle measure of a circle multiplied by the area of the circle will yield the area of the sector

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0.5*m*n*4=0.5*4*m*n = 2*m*n = 2mn

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The answer is None of the above
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3 years ago
Angela and Michelle shared some money in the ratio 4: 9 then Angela gave Daniel half her share.Michelle gave Daniel a third of h
SVEN [57.7K]

Using a system of equations, it is found that £52 was originally shared.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, the variables are given as follows:

  • Variable x: Angela's share.
  • Variable y: Michelle's share.
  • Variable z: Daniel's share.

Angela and Michelle shared some money in the ratio 4: 9, hence, considering t as the total:

  • x = \frac{4t}{13}.
  • y = \frac{9t}{13}

Angela gave Daniel half her share.Michelle gave Daniel a third of her share. Daniel was given a total of £20, hence:

\frac{x}{2} + \frac{y}{3} = 20

\frac{4t}{26} + \frac{9t}{39} = 20

\frac{12t + 18t}{78} = 20

30t = 20 x 78

t = 20 x 78/30

t = £52.

More can be learned about a system of equations at brainly.com/question/24342899

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