A Carpenter is preparing to put a roof on a garage that is 20’ x 40’ x 20’. A steel support beam H equals 44 feet in length is positioned in the center of the garage. Do you support the roof, another beam will be attached to the top of the center beam. At what angle of elevation is the new beam? In other words, what is the pitch of the roof?

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

answer: hey there,

the answer you are looking for is a..

hope this you!

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