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Length and Perimeter

This educational resource discusses the concepts of length and perimeter measurements, emphasizing that all measurements are approximations. It explains how the precision of measuring instruments affects measurement outcomes, showcasing examples with rulers and micrometers. It also defines the perimeter as the total distance around a shape, calculated by summing the lengths of its sides. This PowerPoint is part of a free teaching resource available at www.worldofteaching.com.

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Length and Perimeter

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  1. Length and Perimeter

  2. Measurements • All measurements are only approximations. • No measurement is ever exact. • Using a ruler with 0.5cm marking, We might measure this eraser to be 5.5 cm long. • If we used a more precise ruler, with 0.1 cm markings, then we find the length to be 5.4 cm. • If we used a micrometer that measured to the nearest 0.01 cm, we may find that the measured length is 5.41 cm. • All measurements are approximations.

  3. Limit of Accuracy • The Limit of Accuracy of a Measuring Instrument are +/- 0.5 of the unit shown on the instrument’s scale

  4. Perimeter • The Perimeter of a shape is the distance around the shape. It is the sum of the lengths of the sides of the shape

  5. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com Is home to well over a thousand powerpoints submitted by teachers. This a free site. Please visit and I hope it will help in your teaching

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