Three points are coplanar:

a. always

b. sometimes

c. never

hurry !

A. always

explanation:

Coplanar points are three or more points which all lie in the same plane.

Any set of three points in space is coplanar.

-hope this helps

geometry: triangles

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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+

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