Find the shaded area

Step-by-step explanation:

Shaded area= whole thing minus blank.

Shaded area = (12*18)-(8*8).

Shaded area = 152cmm squared

Hope this helps plz mark brainliest :D

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.

answer:  

123455421

step-by-step explanation: easy