Due to the way paper is made, its fibers tend to run in one direction. If you tear in that direction, along the fibers, the paper tears easily, and the fibers guide the tear to be straight across.
If you tear the paper across the fibers, all of the above is untrue.
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Is a Tear that is straigh OBious
We don't wear paper clothes because they lack durability and comfort compared to traditional fabrics. Paper is not designed to withstand regular wear and tear, and it can easily tear or become damaged in various weather conditions. Additionally, paper clothing would be impractical for many activities due to its limited flexibility and breathability. Lastly, the environmental impact of producing and disposing of paper clothing also raises concerns.
Fold the paper along the line where you want to cut, lick the crease several times, fold the paper the other way and repeat, and then finally tear.
Of course. Just like you can tear a 100-acre sheet of paper into two 50-acre pieces.
Cut out any triangle. Tear it into 3 pieces with a corner in eh. You should then be able to put the corners together to make a straight line. So, angles in a triangle add up to 180 degrees.