The following box plot shows the number of years during which 40 schools have participated in an interschool swimming meet: see attached image below ♥

At least how many schools have participated for more than 1 year and less than 6 years?

4 schools
8 schools
10 schools
20 schools

I possibly think it is either 8 or 10 but I am sorry if I am wrong.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.