Aladder is leaning against a building so that the distance from the ground to the top of the ladder is 1 foot less than the length of the ladder. find the length of the ladder if the distance from the bottom of the ladder to the building is 5 feet.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have