Sharmi sha

school powerpoint ppt tamil math mathematics collage b.ed student students maths ppt tamil medium basic concept 8th refraction scattering rule for lens concave lens convex lens converging lens telescope microscope focal lengt near point farpoint eye defect eyes lens optics probability higher education education figure geometry coordinate geometry life examples state board 10th area of triangle section formula studies simple explain exercise example 7th question maths compound variation presentation simple lesson plan séquence series sums examples 10 geometric progession expression polynomial algebraicidentity variable constant iyarkanitham college tamilnadu 9th full explain algebra