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Mamont248 [21]
2 years ago
13

A circle has a circumference of 450cm

Mathematics
2 answers:
Nastasia [14]2 years ago
7 0

Answer:

288 degrees at the center of the circle

Step-by-step explanation:

Subtends is opposite

90/450=0.2  so the degree of the 90 cm arc is (0.2)(360)=72 degree arc.

It's subtend would be 360-72=288 degree arc.

This is because it is also the major arc of the central angle.

anzhelika [568]2 years ago
3 0

The circumference of the circle is actually the perimeter ( length of the boundary ) of the circle . And a part of the circle which lies between two distinct points on the circumference of the circle is called an arc . If the length of the arc is less than half the circumference , it is called minor arc and remaining portion which is more than half of the circle ( but natural ) is called major arc .

When these two points , which make the arc are joined separately to the centre of circle , these arms make angle at the centre . This is called the angle subtended by the arc at the centre of the circle .

There is a beautiful logical relation exists between arc length and the angle , the arc makes ( subtends ) at the centre of the circle . This relation is as under , the wholle circle subtends an angle of 360 degree at the centre . Half the circumference subtendr 360 / 2 ie 180 degree at the centre . The logical relation becomes Arc Length = Circumference × angle in degrees it ( the arc ) subtends at the centre of the circle / 360 degree . So the answer is very simple :- The Arc Length = 36 × 90 / 360 or 9 units ( may be centimetres or metres or inches , feet , yards , etc ) . Which is definitely length of the minor arc . The length of the major arc ( remaining portion of the circumstance ) is 36 - 9 = 27 units . Hence the required answer of the sum is 9 units .

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3 0
3 years ago
PLEASE ANSWER FAST AND CORRECTLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Paha777 [63]

Answer:

C. 7790.83 cm^3

Step-by-step explanation:

The volume of a sphere is given by

V = 4/3 pi r^3

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6 0
3 years ago
The function f(x) = 300(0.5)x/100 models the amount in pounds of a particular radioactive material stored in a concrete vault, w
allsm [11]

The amount of the radioactive material in the vault after 140 years is 210 pounds

<h3>How to determine the amount</h3>

We have that the function is given as a model;

f(x) = 300(0.5)x/100

Where

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  • f(x) is the amount  in pounds

Let's substitute the value of 'x' in the model

f(x) = 300(0.5)x/100

f(x) = \frac{300(0.5) * 140}{100}

f(x) =\frac{21000}{100}

f(140) = 210 pounds

This mean that the function of 149 years would give an amount of 210 pounds rounded up to the nearest whole number.

Thus, the amount of the radioactive material in the vault after 140 years is 210 pounds

Learn more amount radioactive decay here:

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Karolina [17]

Answer:

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Step-by-step explanation:

This is the link to the same question i think with a answer, im not good at these types of math but hopefully this helps you guys out! brainly.com/question/13982030

8 0
3 years ago
2(x + 14) + (2x - 14)
VladimirAG [237]

Answer:

4x + 14

this will be your answer

4 0
3 years ago
Read 2 more answers
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