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nignag [31]
3 years ago
6

Calculate the circumference and area of this circle. 4cm radius​

Mathematics
2 answers:
BigorU [14]3 years ago
7 0

Answer: Using the formula,

Area=π×r2.

Area=π×r2.

=π×(4 cm)2.

=16π cm2≈50.24 cm2.

Step-by-step explanation:

Alja [10]3 years ago
5 0

Answer:

the circumference is 25.133 and the area is 50.265

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A cylinder and cone have the same height and radius. The height of each is 5 cm, and the radius is 2 cm. Calculate the volume of
never [62]

Answer:

The volume of a cylinder is 62.8 cm and the volume of a cone is 20.9 cm³ .

Step-by-step explanation:

Formula

Volume\ of\ a\ cylinder = \pi r^{2} h

Volume\ of\ a\ cone = \pi r^{2} \frac{h}{3}

Where r is the radius and h is the height .

As given

A cylinder and cone have the same height and radius. The height of each is 5 cm, and the radius is 2 cm.

\pi = 3.14

Thus

Volume\ of\ a\ cylinder =3.14\times 5\times 2\times 2

                                             = 62.8 cm³

Thus the volume of a cylinder is 62.8 cm³ .

Volume\ of\ a\ cone = 3.14\times 2\times 2\times frac{5}{3}

Volume\ of\ a\ cone =\frac{5\times 3.14\times 2\times 2}{3}

Volume\ of\ a\ cone =\frac{62.8}{3}

                                        = 20.9 (Approx) cm³

Thus the volume of a cone is 20.9 cm³ .

Therefore the volume of a cylinder is 62.8 cm and the volume of a cone is 20.9 cm³ .

8 0
3 years ago
Find the number that makes the ratio equivalent to 1:4.
amid [387]
8:2 hope this helps
7 0
3 years ago
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Plz help me because I need it ​
Musya8 [376]

Answer:

C

Step-by-step explanation:

7 0
3 years ago
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Find the measures of the exterior angle using the degrees of 75 and 50
ivann1987 [24]

Answer:

measure of exterior angle is 125°

Step-by-step explanation:

measure of exterior angle is equal to sum of measures of opposite interior angles,

so,

exterior angle ( e ) = 75° + 50°

=》e = 125°

8 0
3 years ago
If the midpoint is located at (-6,-2) and one endpoint is at (1,7), what is the coordinates of the other endpoint?
FromTheMoon [43]

Answer:

The other endpoint would be (-13, -11)

Step-by-step explanation:

In order to find the coordinates of an end point, we need to note that the midpoint would be the average of the two values. We'll call the unknown point P and we'll start by looking at the x values only.

(1 + Px)/2 = -6 ----> multiply by 2

1 + Px = -12 -----> subtract 1

Px = -13

Now we can do the same with the y values.

(7 + Py)/2 = -2 ----> multiply by 2

7 + Py = -4 ------> subtract 7

Py = -11

4 0
3 years ago
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