Which answer choice gives the correct explanation for this problem?

40 ÷ 4

a) 4 groups of 10 positives
b) 4 groups of 10 negatives
c) 10 groups of 4 positives
d) 10 groups of 4 negatives

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.