What is the sum of the infinite geometric series?

- 288

Step-by-step explanation:

The n th term of a geometric series is

= a

- 144 is in this form

with a = - 144 and r =

= = = = - 288

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.