SOLUTION: The base of right pyramid ABCDF is rhombus ABCD. Segment FK is the altitude of the pyramid. The angle between the lateral edge FB and FK is 36°. Find the area and the perimete

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Question 1206859: The base of right pyramid ABCDF is
rhombus ABCD. Segment FK is the
altitude of the pyramid. The angle
between the lateral edge FB and FK is
36°. Find the area and the perimeter of
△BFD if the length of the smaller
diagonal BD is 10 cm. Round your
answer to the nearest cm .
Found 2 solutions by Edwin McCravy, mccravyedwin:
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
Answer by mccravyedwin(406)   (Show Source): You can put this solution on YOUR website!



First find the area of triangle BFK, half of triangle BFD.

BD=10, so BK=5













To find the perimeter, we need to find FB.














.

Rounding off to the nearest integer:



.

Edwin
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