Could these triangles be congruent? yes, if ab - deyes, if bc = 7yes, if ab - efno, because the hypotenuses must have different lengths

In ΔABC  

∠A=33° and ∠C=88°

By angle sum property of triangles

∠A+∠B+∠C=180°

⇒33°+∠B+88°=180°  

⇒∠B=180°-33°-88°  [subtract 33° and 88° from both sides]

⇒∠B=59°

Now ,In ΔDEF  

∠D=33° and ∠E=58°

By angle sum property of triangles

∠D+∠E+∠F=180°

⇒33°+58°+∠F=180°  

⇒∠F=180°-33°-58°  [subtract 33° and 58° from both sides]

⇒∠F=89°

Thus ΔABC is not congruent to Δ DEF as∠C and ∠B are not congruent to any angle of the Δ DEF .

⇒The right option is C."No, C is not congruent to any angle in DEF."

D- no, because the hypotenuses must have different lengths

Step-by-step explanation:

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.

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.