Sunday

September 21, 2014

September 21, 2014

Posted by **dan** on Tuesday, March 15, 2011 at 12:09am.

- math -
**Anonymous**, Tuesday, March 15, 2011 at 12:58amRadius of smaller circle: a-18 (inchs)

Radius of larger circle: a (inchs)

Circumference of smaller circle:

2*pi*(a-18)=2*pi*a-2*pi*18=2*pi*a-36*pi (inchs)

Circumference of larger circle:

2*pi*a (inchs)

Difference betwen ircumference of smaller and large circle:

D=2*pi*a-(2*pi*a-36pi)=

2*pi*a-2*pi*a+36pi=

36*pi (inchs)

D=36*pi (inchs)

1feet=12 inchs

D=(36*pi)=(3*pi)ft

D=(A*pi)

A*pi=3*pi Divide with pi

A=3

- math -
**Anonymous**, Tuesday, March 15, 2011 at 1:00amD=(36*pi)in=(3*pi)ft

**Answer this Question**

**Related Questions**

Please help with circle tangents geometry - Two circles of different sizes are ...

math...2 word problems - Two questions: (1) In a class every boy is friends with...

Math - Jason drew two circles. the diameter of the larger circle is twice the ...

geometry maths - a circle of radius 1 is inscribed in a square. A smaller circle...

algebra 1 - a high school wrestling mat must be square with 38-foot sides and ...

math - two circles intersect at point T.if the small circle has a raduis of 4 ...

algebra 1...urgent - a high school wrestling mat must be square with 38-foot ...

Math - (Two concentric circles are shown)The smaller circle's circumference is ...

Pre-Calc (Circles) - Describe the conditions necessary, where circle A has a ...

Algebra - in a dartboard ther r 2 circles,one large circle n a smaller shaded ...