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Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?