Posted by **johanie** on Thursday, January 10, 2013 at 11:16pm.

: in the pyramid shown in the figure , AB=9 in ., BC= 12in ,and BD= 5 in . the three face angle at B are each 90 degree . calculate the three face angles at A and the total surface of the solid.

- solid mensuration -
**jk.jk.jk.k.**, Monday, January 12, 2015 at 7:21pm
,j.j.jk.k.

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