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Question Number 46686 by peter frank last updated on 30/Oct/18

Commented by peter frank last updated on 30/Oct/18

ABCDEFGH is a cube.find the  projections of  a)AF on  ABCD  b)AG on ABCD  c)FD  on HGCD  d) EC on  FGCB

ABCDEFGHisacube.findtheprojectionsofa)AFonABCDb)AGonABCDc)FDonHGCDd)EConFGCB

Answered by tanmay.chaudhury50@gmail.com last updated on 30/Oct/18

let side of cube of length a  A be origin(0,0,0)  D(a,0,0)   F(0,a,a)  point B is the foot of perpendicular from point  F on plane ABCD    so projection of AF on ABCD is AB  (yaxis)

letsideofcubeoflengthaAbeorigin(0,0,0)D(a,0,0)F(0,a,a)pointBisthefootofperpendicularfrompointFonplaneABCDsoprojectionofAFonABCDisAB(yaxis)

Answered by tanmay.chaudhury50@gmail.com last updated on 30/Oct/18

ptojection of AG on ABCD is AC  projection of FD on HGCD is DG  prljection of EC on EGCB is FC

ptojectionofAGonABCDisACprojectionofFDonHGCDisDGprljectionofEConEGCBisFC

Commented by peter frank last updated on 30/Oct/18

thank you

thankyou

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