# Geometry

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The wheel of an adult's bicycle has diameter 26 in. The wheel of a child's bicycle has diameter 18 in. To the nearest inch, how much farther does the larger bicycle wheel travel in one revolution than the smaller bicycle wheel?

• Geometry -

to do this, we calculate both of the circles' circumference. the bigger circle has diameter of 26 in, while the smaller has diameter of 18 in.
now recall that the circumference of a circle is given by
C = 2*π*r
or given the diameter,
C = π*d
where
π = constant equal to 3.14
d = diameter
substituting,
bigger circle:
C = π*d = 3.14*26 = 81.64 in
smaller circle:
C = π*d = 3.14*18 = 56.52 in
then we subtract:
81.64 - 56.52 =
25.12 in

hope this helps~ :)

• Geometry -

the endpoints of a diameter of a circle are A(2,1) and B(5,5). Find the area of the circle in terms of pie.

• Geometry -

539 centemeters

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