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2 years ago

Please help me !!! Need done now I will reward brainliest

Mathematics

2 answers:

xeze [42]2 years ago

6 0

Circumference is simply:
2*r*π or d*π

r = radius
d= diameter
C = circumference (perimeter of circle)

If d = 5m then C is d*π = 5π meters

If r = 2m then C is 2*r*π = 2*2*π = 4π meters

If d = 3m then C is d*π = 3π meters

If r = 3m then C is 2•r•π = 2*3*π = 6π meters

If d =2m then C is d*π = 2π meters

Crazy boy [7]2 years ago

4 0

Okay so if the line goes through half of the circle it's called the radius. If it goes through the whole thing it's the diameter. The equation to find the circumference is pi times diameter. So the first one is 5pi, second is 4pi, third is 3pi, fourth is 6pi, and the last one is 2pi.

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Question:

Which statements are true regarding the area of circle D? Select two options.

The area of the circle depends on the square of the radius.

The area of circle D is 36Pi centimeters squared.

The area of circle D is 324Pi centimetres squared

The area of the circle depends on the square of pi.

The area of the circle depends on the central angle.

Answer:

The following statements are true regarding the area of circle D:

The area of the circle depends on the square of the radius
The area of circle D is 324Pi centimeters

Step-By-Step Explanation:

As we know, the formula for area of the circle is given by,

$A=\pi r^{2}$

Where, r = radius of the circle. In figure, CD = radius = 18 cm

So, the circle area can be measured as

$A=\pi(18)^{2}=324 \pi \mathrm{cm}^{2}$

From this, concluding that the circle area depends on radius square and its value is $324 \pi \mathrm{cm}^{2}$ . Hence, the statement given in option A and C are correct (reveals that option B is incorrect).

As the Pi is constant, the circle radius cannot depend on Pi value and Option D also incorrect. The area of sector of circle only depends on ratio of central angle to entire circle (So option E also incorrect).

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Answer:

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Step-by-step explanation:

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