On a tractor, the diameter of the large tire is 5 feet and the diameter of the small tire is 3 feet 9 inches. A sketch is given
5 feet
3 ft 9 in
A toy tractor is made to scale from the actual tractor. On the toy tractor, the diameter of the large tire is 8 inches. What
is the diameter, in inches, of the small tire on the toy tractor?

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation: