brittanyfox411
14.04.2021 •
Mathematics
. Mrs. Webster cut a triangle with a height
of 4 inches and a base of 6 inches out
of a sheet of paper measuring 10 inches
by 12 inches. She recycled the unused
paper. What is the area of the paper
she recycled?
Solved
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Ответ:
Explanation:
Imagine that this plane was a saw blade, or a laser, that cut the cone. We would have two pieces and each piece would have a shape of an ellipse on them. The cutting plane would also have the same ellipse shape.
Or you think of the cutting plane as a flat piece of cloth. If we cut everything around the cone, then we would have an ellipse shaped hole as a result.
The reason why we get an ellipse and not a circle is because the plane is angled like that. It needs to be perfectly parallel to the circular base in order to get a circular cross section.