The perimeter of a church window is 60 inches. If the window is in the shape of a regular pentagon, what is the length of each side of the window?
A. 12 inches
B. 10 inches
C. 6 inches
D. 8 inches
a?
What is the circumference of a circle with a diameter of 30 centimeters?
A. 188.4 centimeters
B. 47.1 centimeters
C. 94.2 centimeters
D. 9.55 centimeters
c?
The spoke of a wheel reaches from the center of the wheel to its rim. If the circumference of the rim of the wheel is 42 inches, how long is each spoke? Round your answer to the nearest hundredth.
A. 7 inches
B. 6.25 inches
C. 13.38 inches
D. 6.69 inches
d?
In order for a button to fit through its buttonhole, the hole needs to be the size of the button's diameter. What size buttonhole is needed for a button with a circumference of 9.42 centimeters?
A. 3 centimeters
B. 6 centimeters
C. 1.5 centimeters
D. 4 centimeters
a?
2007-07-02 05:21:49 · 10 answers · asked by wolf_in_da_room 1 in Science & Mathematics ➔ Mathematics
1. 60 inches is the total length of all sides. A pentagon has 5 sides, and a regular pentagon has 5 sides that are all the same length. Therefore, the length of each side of the window is 60inches/5sides =12inches
2. The formula for the circumfrence is 2π r. r is the radius of the circle which is one half the diameter, so r = 15 centimeters. The circumfrence is the 2*π*15 = 30π = 94.2477
3. Using the same formula as #2. 2π r = 42 Then divide both sides by 2 and π r = 21. Then divide both sides by π and r = 6.68
4. Same thing again. 9.42 = 2π r. Since you are looking for the diameter now instead of the radius, all you need to do is divide 9.42 by π . 9.42/π = 2.9984
Note: π is a non-repeating, non terminating decimal. This means that there is no repeating pattern, and it does not end. The first 10 digits of π are 3.141592653
2007-07-02 05:47:38 · answer #1 · answered by Katie 3 · 0⤊ 0⤋
1) A 12 in. 60/5 sides = 12
2) C=d*pi=30*3.14=94.2 cm
3) C=2pi*r...42=2pi*r....42/(2pi) = 6.69 in.
4) C=pi*d...9.42=pi*d....9.42/pi = 3 cm
2007-07-02 05:28:30 · answer #2 · answered by hrhbg 3 · 1⤊ 0⤋
(1) A
A pentagon has 5 sides. 60/5 = 12"
(2) C
Circ = D*pi = 30*3.14159 = 94.248
(3) D
Circ = 2*pi*r ==>
42 = 2*3.14159*r
r = 6.6845
(4) A
Circ = pi*D ==>
9.42 = 3.14*D
D = 3
2007-07-02 05:26:56 · answer #3 · answered by yeeeehaw 5 · 2⤊ 1⤋
This place can help with geometry. in the middle where it says homework video tutors click it and then choose the lesson and it'll show you a video. Just ask your geometry question here and we'll try to answer it! there's a million brains here!
2016-05-21 02:32:20 · answer #4 · answered by ? 3 · 0⤊ 0⤋
60/5=12, so A is correct.
30/2*2pi=9434, so C is correct.
42/2pi=6.69, so D is correct.
9.42/2pi=3, so A is correct.
2007-07-02 05:30:59 · answer #5 · answered by ayy 4 · 1⤊ 0⤋
1) a) coz pentagon is 5 sides 60/5=12
2) b) coz C= p*d 30 * 3.14= 47.1
3) d)
4) a)
2007-07-02 05:38:57 · answer #6 · answered by [: xoxo :] 2 · 1⤊ 1⤋
love the questions one at a time first 10 inches
2007-07-02 05:35:03 · answer #7 · answered by david p 3 · 0⤊ 3⤋
A 12
C 92.24
D 6.68
A 3
2007-07-02 05:27:55 · answer #8 · answered by Howard 1 · 1⤊ 0⤋
1. A
2. C
3. D
4. A
2007-07-02 05:38:43 · answer #9 · answered by JEWfan2 2 · 1⤊ 1⤋
DO YOU REALLY NEED SOMEONE TO do a calculation of Circumference = pi * D or 2*pi*R ?
Surely you jest!!
2007-07-02 05:26:26 · answer #10 · answered by cattbarf 7 · 0⤊ 4⤋