Convert 15 meters per second into kilometers per hour. 9 kilometers per hour
42 kilometers per hour
4.2 kilometers per hour
54 kilometers per hour

Answer is in the file below

tinyurl.com/wpazsebu

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

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