The procedure to follow when measuring long distances is: Step 1 Pegs are placed A and B to mark the beginning and the end of the distance to be measured, and ranging poles are set in line with A and B. Step 2 The back man holds the zero point at the centre of the starting peg A. The front mar drags his end of the chain or tape in the direction of peg B. Directed by the back man, he stretches the chain, in line with the ranging poles. Then he plants an arrow to mark the end of the chain or tape see Fig. Step 3 Both men move forward with the chain or tape and the procedure is repeated, the back man starting this time from the arrow the front man has just planted see Fig.

Step 4 The procedure is repeated until the remaining distance between the last arrow and the peg B is less than one chain length see Fig. The number of arrows used during the procedure represents the number of times the full length of the chain or tape has been laid out.

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- Measurement?

When reaching peg B , the back man has used 7 arrows. The measuring tape a chain would be too heavy must then be stretched horizontally by the two men above the crop.

## Measurement Index

When measuring distances it is important to keep the tape horizontal. Push two arrows or two pegs into the soil to mark the distance to be measured see Fig. Note that the Measure app is in no way meant to be accurate enough to use for making cuts on a piece of wood or important decisions based on size. It's more of a tool to get a fairly accurate idea of how big or small something is. In my testing, I found the app to be anywhere from a few inches off in a measurement, to a more consistent half-inch off.

I found the closer I held the phone to the start and end points, the more accurate the app became.

## Measurement

Trying to measure how wide my office door is, for example, I started by standing about 5 feet away from it and marking my points to measure. The app came back with So I moved to about a foot away from the door and remeasured, and that result was I'm OK with that. Before I forget, there's also a level in the new Measure app. It's the same level that's been present in the Compass app for the past few years.

Switch to the level by selecting the Level tab along the bottom of the screen, and then place your phone on the surface you want to level. Once the two circles line up and 0 is read in the middle, the interface goes from black and white to green. Create rectangles with a given area Get 5 of 7 questions to level up! Transition from unit squares to area formula Get 5 of 7 questions to level up! Area of squares and rectangles Get 5 of 7 questions to level up! Perimeter: introduction Opens a modal.

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Perimeter of a shape Opens a modal. Finding perimeter when a side length is missing Opens a modal. Finding missing side length when given perimeter Opens a modal. Find perimeter by counting unit squares Get 3 of 4 questions to level up! Find perimeter when given side lengths Get 5 of 7 questions to level up!

Find a missing side length when given perimeter Get 5 of 7 questions to level up! Volume of a rectangular prism.