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MakcuM [25]
3 years ago
6

The circumference of a circle is 7 π m What is the area of the circle?​

Mathematics
1 answer:
galina1969 [7]3 years ago
4 0
I will find the radius first
2pi(r) = 7pi
Divide 7pi by 2pi
Hence radius is 3.5m
Now the area pi(r^2)
Pi(3.5^2)
The area of the circle is 38.48 or 49/4 pi

AREA = 49/4pi or 38.5m^2 to one d.p
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The perimeter of a convex pentagon is 15 feet. What is the effect on its perimeter if each side is doubled?
Ad libitum [116K]

Answer:

If  each side of pentagon is doubled then its perimeter will also be doubles. The new perimeter is 30 feet.

Step-by-step explanation:

Let the length of all five sides of pentagon = <em>v, w, x, y</em>, and <em>z</em>.

Perimeter of pentagon = Sum of lengths of its all five sides = (<em>v + w + x + y + z</em>) = 15 feet

If each side of pentagon is doubles then,

New perimeter of pentagon = (2<em>v + </em>2<em>w + </em>2<em>x + </em>2<em>y + </em>2<em>z</em>)

= 2 (<em>v + w + x + y + z</em>)

= 2 (15)

= 30 feet

Therefore, if each side of pentagon is doubled then its perimeter will also be doubled.

5 0
3 years ago
I'm giving out brainliest, to the person who is right!
Brilliant_brown [7]

Answer:

the second bag

Step-by-step explanation:

to find it u have to think of it as fractions. 3/20 has to equal ?/500  so divide 500 by 20 and you get 25. then multiply the 3 by 25 which equals 75. so it would be 75/500 which is less than 170/500  

8 0
3 years ago
The length of a rectangle is 8 feet longer than the width. If the perimeter is 80 feet, find the length and width of the rectang
Klio2033 [76]

perimeter = 2L + 2W

 L=8+w

perimeter = 2(8+w) +2w

80 =16+2w+2w

80 = 16 +4w

64 =4w

w=64/4 = 16

 l=16+8 =24

 length = 24 feet

width = 16 feet


 check 2(24) +2(16) = 48 + 32 = 80

7 0
3 years ago
Select all the correct answers.
cluponka [151]

Answer:

A; w = 52h

                                                                                                   

A; w = 52h

B; w = 26h

C; 1/26w=h

D; 1/52w=h

8 0
3 years ago
I need help finding CR, AB, and CAB
aleksandrvk [35]

Answer:CR= 53

AB = 118

CAB = 236

Step-by-step explanation: a whole is circle is equal to 360 degrees and when you see the two parts which dint have an angle, they look the same size. So I pluses 53 and 71 than subtracted from 360. Which then I divided it by two then you get the angle for A to B.

Hope this helped and hope this is the correct answer.

4 0
3 years ago
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