Are all isosceles triangles similar? Are all right triangle similar? Are all isosceles right triangles similar? Explain. Please don't answer with one answer, blank or a ridiculous response. This is serious please.

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Please explain each one.

10 ! in a race, nick is 50 feet in front of jay after ten seconds. how fast can nick run, if jay can run 20 feet per second?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

The median for the given set of six ordered data values is 29.5 9 12 25 __ 41 48 what is the missing value?