In patrulaterul convex abcd, măsura unghiului b este de 70 grade iar diagonala ac face cu latura [ab] un unghi de 30 grade, iar cu latura [ad] un unghi de 40 grade. masura unghiului acd este 50 grade, iar drepturile ad și bc se intersectează in e. aratati ca ac congruent ce. urgnt

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.

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.

srry idk

step-by-step explanation:

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8