Please help me with number 5 and 6

5) Quadrilateral; not regular

6) Octagon; regular

Step-by-step explanation:

5) is a quadrilateral because it has 4 sides

It's not regular because not all angles have the same measurements

6) is an octagon because it has 8 sides

It's regular because all angles have equal measurements

1,589.63 in.^3

step-by-step explanation:

i hope this you : d

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