<1
Solve for <1.
<1 = [?]°
52°
<3 116°

Step-by-step explanation:

<3° +116 = 180 (linear pair)

<3° = 180-116 = 64°

<1° + <3° + 52 = 180 ( angle sum property of a triangle)

<1° +64+52=180

<1°= 180-64-52

<1°= 64°

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.