The display of a student's calculator shows: 1.2731568

the student is most likely looking at

a natural number
an integer
a whole number
a rational number

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.

could

step-by-step explanation:

u send me a picture of ur work