std 3 Maths SCERT [Lesson 8 Measure and Tell]
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Lesson 8 Measure and Tell Length *Length of objects or distances are measured using different units of length. *Non-standard units of length are Span, Foot and Cubit [length of body parts] Non-standard units of length differ from person to person or from object to object. *Standard units of length are Centimetre, metre and kilometre.Standard units of length do not change. *We measure the length of pencil, book etc are measure in centimetre. Length of table, bench etc are measure in metre. Very long distance such as distance between two towns are measure in Kilometre. Metre Scale An instrument name for measuring length metre Scale. Metre Scale is long wooden metalic rod of fixed length. It is devided into 100 equal parts. Each part is called Centimetre. Ruler/Scale tape Relation between metre ,Centimetre and kilometre. * we use cm for centimetre m for metre km for kilometre 100cm = 1 metre 50cm = 1/2 metre 1000 m = 1 kilometre Activity 1 *Draw a line 9cm *D...