2 The Almighty Ruler 3 Margin for ERROR!!! This gap between the edge of the ruler and the line for zero is called a margin. You need to account for it when measuring using a ruler. 4 Flush with edge but Lined up at the edge of Ruler. This seems correct however this will make you measurements inaccurate. 5 In line with Zero. This one is lined up with the zero. That is correct!! 6 This is why it matters!! 19.4 cm when lined at edge. 7 This is why it matters!! 19.7 cm when lined up correctly 8 Whats Wrong Something is not quite right here 9 Straight line for a correct measurement A straight meter stick gives us an accurate measurement 10 What to do
Make sure you are lined up straight (parallel and perpendicular)
Get down/up to eye level.
Take an exact measurement.
11 Not Eye-Level Can you read this accurately I dont think so!! 12 Eye- Level Ahhh!!!! Thats much better. 13 Tape-Measurer For measuring things without straight sides 14 Remember
Use a straight measuring device.
Get to eye-level.
Make an accurate measure.
I will be watching!!
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