geometry math? - XP Math - Forums

 XP Math - Forums geometry math?

 07-17-2007 #1 wolf_in_da_room Guest   Posts: n/a geometry math? 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 inchesa?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 centimetersc? 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 inchesd? 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 centimetersa?
 07-17-2007 #2 cattbarf Guest   Posts: n/a DO YOU REALLY NEED SOMEONE TO do a calculation of Circumference = pi * D or 2*pi*R ? Surely you jest!!
 07-17-2007 #3 yeeeehaw Guest   Posts: n/a (1) AA pentagon has 5 sides. 60/5 = 12"(2) CCirc = D*pi = 30*3.14159 = 94.248(3) DCirc = 2*pi*r ==>42 = 2*3.14159*rr = 6.6845(4) ACirc = pi*D ==>9.42 = 3.14*DD = 3
 07-17-2007 #4 Howard Guest   Posts: n/a A 12c 92.24d 6.68a 3
 07-17-2007 #5 hrhbg Guest   Posts: n/a 1) A 12 in. 60/5 sides = 122) C=d*pi=30*3.14=94.2 cm3) C=2pi*r...42=2pi*r....42/(2pi) = 6.69 in.4) C=pi*d...9.42=pi*d....9.42/pi = 3 cm
 07-17-2007 #6 d_c Guest   Posts: n/a relax, cat.your answers are all correct.
 07-17-2007 #7 websurfer09 Guest   Posts: n/a 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.
 07-17-2007 #8 david p Guest   Posts: n/a love the questions one at a time first 10 inches
 07-17-2007 #9 JEWfan2 Guest   Posts: n/a 1. A2. C3. D4. A en.wikipedia.org
 07-17-2007 #10 sweet girl Guest   Posts: n/a 1) a) coz pentagon is 5 sides 60/5=122) b) coz C= p*d 30 * 3.14= 47.13) d)4) a)

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