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How do you fold a piece of paper vertically top to bottom?
First identify which are the long sides. Paper can be held either in portrait or landscape position. In portrait, the longer sides are the sides, and the shorter sides are the top and bottom. In landscape, it is the opposite. Since your question didn't indicate portrait or landscape, I will give the directions for portrait. For landscape, just turn the paper so that the longer sides are top and bottom. For portrait, make sure that the longer sides are at the sides. Now fold the paper so that the longer sides touch, then press the paper to make a crease along the fold. For landscape, fold the paper so that the shorter sides touch, and press the paper to make a crease along the fold.
Do parallel lines touch?
No they dont touch.
If two lines are coplanar then they must touch?
No. If they are parallel (but not identical), they will not touch.
Why do dimes Quarters and half dollars have notches?
The half-dollar, quarter, and ten-cent coin denominations were originally produced from precious metals. Reeded edges were eventually incorporated into the design of these denominations to deter counterfeiting and the fraudulent use of the coins, such as filing down the edges in an attempt to recover the precious metals. Currently, none of the coins produced for circulation contain precious metals. However, the continued use of reeded edges on current circulating coinage of larger denominations is useful to the visually impaired. For example, the ten-cent and one-cent coins are similar in size; the reeding of the ten-cent coin makes it easily identifiable by touch.
If the discriminant is zero the graph of a quadric function will cross or touch the x axis how many times?
It will touch it once.
