9 TH NEW BOOK -unit -1 அளவீடுகளும் அளவிடும் கருவி்களும் POWER POINT (PPT)

unit -1அளவியல்
PREPARED BY.
 J.VASUDEVAN M.Sc.,M.Phil.,B.Ed.,
GRADUATE TEACHER
GHS RAYAPURAM,
THIRUVARUR DISTRICT

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